: FDA authorizes the first single-dose COVID-19 vaccine

The Food and Drug Administration on Saturday granted emergency authorization to Johnson & Johnson’s COVID-19 vaccine, making it the third vaccine to become available to Americans during the pandemic and the first to only require one dose.

The Food and Drug Administration on Saturday granted emergency authorization to Johnson & Johnson’s COVID-19 vaccine, making it the third vaccine to become available to Americans during the pandemic and the first to only require one dose.