# Coronavirus COVID-19 (2019-nCoV) Thread - 2021 Breaking News **URL:** \ **Category:** The Quarantine Zone\ **Tags:** covid-quarantine\ **Created:** [January 1, 2021, 8:03am UTC](https://boards.straightdope.com/t/coronavirus-covid-19-2019-ncov-thread-2021-breaking-news/929428 "2021-01-01T08:03:30Z")\ **Posts on this page:** 1\ **Showing post:** 674
**Author:** ![GreenWyvern](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/greenwyvern/32/2834_2.png) [@GreenWyvern](https://boards.straightdope.com/u/GreenWyvern)\ **Post date:** [February 25, 2021, 12:51am UTC](https://boards.straightdope.com/t/coronavirus-covid-19-2019-ncov-thread-2021-breaking-news/929428/674 "2021-02-25T00:51:18Z")
More details: > **[Business Insider](https://www.businessinsider.com)** > > Business Insider tells the global tech, finance, markets, media, healthcare, and strategy stories you want to know. > Johnson & Johnson’s single-dose coronavirus vaccine has a 64% efficacy rate at preventing the more contagious South African variant, according to new report posted online by the Food and Drug Administration in the US on Wednesday. > > The new report, prepared by the company, found its **efficacy rate against the 501Y.V2 variant** is seven percentage points higher than an earlier report released by the company. Johnson & Johnson previously said that the vaccine offers 57% protection against moderate to severe Covid-19 infections in South Africa. > > Vaccine efficacy against severe Covid cases was 73%, 14 days after vaccination, increasing to 82% at least 28 days after vaccination. > > There were no deaths due to Covid among South African trial participants who received the J&J vaccine. More than 5,000 South Africans took part in the J&J vaccine trial, of which around half received a placebo vaccine. > > “These results suggest that the vaccine is efficacious against mortality associated with Covid-19,” the report found. > > South Africa became the first country in the world to officially roll out the vaccine last Wednesday. --- _[View the full topic](https://boards.straightdope.com/t/coronavirus-covid-19-2019-ncov-thread-2021-breaking-news/929428)._