J&J's 1-dose shot cleared, giving US 3rd Covid-19 vaccine

J&J's 1-dose shot cleared, giving US 3rd Covid-19 vaccine One dose was 85% protective against the most severe Covid-19 illness, in a massive study that spanned three continents - protection that remained strong even in countries such as South Africa, where the variants of most concern are spreading. https://ift.tt/eA8V8J