The international BRACE trial, investigating the BCG vaccine's efficacy against COVID-19, has found it does not reduce healthcare workers' risk of contracting the disease. Future studies will explore the vaccine's influence on other infections and COVID-19 vaccine responses. A world-leading inter
Aussie researchers call for caution about vaccinating children for COVID-19 - World News sina.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sina.com Daily Mail and Mail on Sunday newspapers.