Johnson & Johnson says its single-shot COVID-19 vaccine is effective in preventing severe cases of COVID-19, but not as well as other two-shot variants of the vaccine that are already on the market.
Johnson & Johnson says its single-shot COVID-19 vaccine is effective in preventing severe cases of COVID-19, but not as well as other two-shot variants of the vaccine that are already on the market.
Johnson & Johnson announced Friday that its single-dose vaccine was 66% effective globally in preventing COVID-19, and 72%..