Tests show coronavirus vaccine by China’s Sinovac is safe, says Brazil’s Butantan Institute

Tests show coronavirus vaccine by China’s Sinovac is safe, says Brazil’s Butantan Institute

An experimental vaccine developed by China’s Sinovac Biotech appeared to be safe in providing protection against the Covid-19 disease caused by the new coronavirus, preliminary results of a late stage clinical trial conducted in Brazil showed on Monday.

Sinovac is the first drug maker to disclose late stage trial results, putting China ahead in attempts to develop a coronavirus vaccine to fight against a pandemic that has killed over 1 million people globally.

Sao Paulo’s Butantan Institute, one of Brazil’s leading biomedical research centres that is carrying out the phase 3 tests, said the vaccine called Coronavac proved to be safe after its two doses were applied to 9,000 volunteers.

But Butantan director Dimas Covas said data on how effective the vaccine is in protecting people against the new coronavirus will not be released until it has been tested on all of the 15,000 volunteers in expanded trials.