COVID-19 reinfections in The Gambia by phylogenetically distinct SARS-CoV-2 variants-first two confirmed events in west Africa.

Bakary Sanyang; Abdoulie Kanteh ORCID logo; Effua Usuf ORCID logo; Behzad Nadjm; Sheikh Jarju; Alasana Bah; Abdoulie Bojang; Mary Grey-Johnson; Joquina Chiquita Jones; Abdou Gai; +12 more... Catherine Sarr; Fatoumata Sillah; Oghenebrume Wariri ORCID logo; Francis Oko; Carla Cerami ORCID logo; Karen Forrest ORCID logo; Alhagie Papa Sey; Haruna Jallow; Davis Nwakanma; Abdul Karim Sesay; Umberto D'Alessandro ORCID logo; Anna Roca ORCID logo; (2021) COVID-19 reinfections in The Gambia by phylogenetically distinct SARS-CoV-2 variants-first two confirmed events in west Africa. The Lancet Global health, 9 (7). e905-e907. ISSN 2214-109X DOI: 10.1016/S2214-109X(21)00213-8
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At the beginning of the COVID-19 pandemic, in early 2020, the scientific community hypothesised that SARS-CoV-2 transmission would eventually be hindered by herd immunity, conferred by natural infection, vaccination, or both.1 However, essential questions about whether infection with SARS-CoV-2 confers protection against reinfection and the length of time the protection lasts after either infection or vaccination remain open. These answers are crucial for the development of appropriate health control measures worldwide and become more important as new viral variants spread.


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