covid19_ vaccine

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A COVID‑19 vaccine is a biotechnology product intended to provide acquired immunity against

coronavirus disease 2019 (COVID‑19). As of September 2020, there were 234 vaccine candidates

in development,[1][2] although no candidate has completed clinical trials to prove its safety

and efficacy. In September, some 39 vaccine candidates were in clinical research, with six

beginning Phase II-III trials and 33 in Phase I–II trials.