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Krause PR, Fleming TR, Longini IM, Peto R, Beral V, Bhargava B, Cravioto A, Cramer JP, Ellenberg SS, Figueroa JP, Halloran E, Henao-Restrepo AM, Ryan MJ, Levine MM, Nason M, Nohynek HM, Plotkin S, Rees H, Singh JA, Swaminathan S. Placebo-Controlled Trials of Covid-19 Vaccines - Why We Still Need Them. N Engl J Med 2021; 384:e2. [PMID: 33264543 DOI: 10.1056/nejmp2033538] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Philip R Krause
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Thomas R Fleming
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Ira M Longini
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Richard Peto
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Valerie Beral
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Balram Bhargava
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Alejandro Cravioto
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Jakob P Cramer
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Susan S Ellenberg
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - J Peter Figueroa
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Elizabeth Halloran
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Ana M Henao-Restrepo
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Michael J Ryan
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Myron M Levine
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Martha Nason
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Hanna M Nohynek
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Stanley Plotkin
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Helen Rees
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Jerome A Singh
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
| | - Soumya Swaminathan
- The affiliations of the members of the WHO Ad Hoc Expert Group on the Next Steps for Covid-19 Vaccine Evaluation are the Office of Vaccines Research and Review, Food and Drug Administration, Silver Spring (P.R.K.), the School of Medicine, University of Maryland (M.M.L.), and Johns Hopkins University (S.P.), Baltimore, and the National Institute of Allergy and Infectious Diseases, Bethesda (M.N.) - all in Maryland; the Department of Biostatistics (T.R.F.), Fred Hutchinson Cancer Research Center (T.R.F., E.H.), University of Washington, Seattle; the Department of Biostatistics, University of Florida, Gainesville (I.M.L.); the Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom (R.P., V.B.); the Indian Council of Medical Research, New Delhi (B.B.); the Faculty of Medicine of the Universidad Nacional Autónoma de México, Mexico City (A.C.); the Coalition for Epidemic Preparedness Innovations, London (J.P.C.); the University of Pennsylvania, Philadelphia (S.S.E., S.P.); the University of the West Indies, Kingston, Jamaica (J.P.F.); the World Health Organization, Geneva (A.M.H.-R., M.J.R., S.S.); the Department of Health Security, Finnish Institute for Health and Welfare, Helsinki (H.M.N.);and the Wits Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg (H.R.), and the Centre for the AIDS Programme of Research in South Africa, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban (J.S.) - both in South Africa
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