Coronavirus latest: Mutation cuts Pfizer vaccine protection to one-third, study shows: Coronaviruses with mutations from the variant first identified in South Africa lower the immune protection offered by one of the most widely used Covid-19 vaccines, a study reported on Tuesday has ... Source: "South Africa" - BingNews South Africa and Brazil: Read all the latest news, … [Read more...] about SA News: Coronavirus latest: Mutation cuts Pfizer vaccine protection to one-third, study shows