Johnson & Johnson's single-shot vaccine proves effective in trial, but less so than Moderna, Pfizer

Video Credit: ABC Action News
Published on January 29, 2021 - Duration: 01:46s

Johnson & Johnson's single-shot vaccine proves effective in trial, but less so than Moderna, Pfizer

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.


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