Having the worst number of Corona cases, Brazil conducted trials of China's Sinovac coronavirus vaccine.  
 
Health Regulator of Brazil suspended clinical trials of Chinese developed COVID-19 vaccine after an "adverse incident" . Several studies have now reached the final stage with day and night of hard work. The Brazilian National Institutes of Health (ANVISA) has ordered Sinovac to suspend vaccine testing due to the side effects found in volunteers who attended.  
 
Still, Full details of the side effects found in volunteers have not yet been released. It will be noteworthy that the experimental studies of the American Pharmaceutical company Eli Lilly, which took place in Washington, also stopped last month.