Johnson and Johnson's single-dose coronavirus vaccine 66 per cent effective overall: study | South China Morning Post

The vaccine worked better in the US - 72 per cent effective against moderate to severe Covid-19 - compared to 57 per cent in South Africa The company said within a week, it will file an application for emergency use in America, and then abroad The vaccine worked better in the US - 72 per cent effective against moderate to severe Covid-19 - compared to 57 per cent in South Africa. Johnson & Johnson's long-awaited vaccine appears to protect against Covid-19 with just one shot - not as strong as some two-shot rivals but still potentially helpful for a world…