Tough road ahead for Chinese Covid vaccine after fall in efficacy rate

New Delhi, Jan 15 (IANS) Countries around the world are becoming increasingly skeptical of the Chinese Sinovac Biotech Covid-19 vaccine, the efficacy rate of which has reportedly fallen dramatically over the past few days. A latest study in Brazil, a country where the largest trial of the Chinese vaccine is being carried out, has revealed that the efficacy rate of the CoronaVac vaccine is just over 50 per cent, a massive fall from the 78 per cent initially projected.

The new revelation has put in a spot of bother countries like Thailand which has ordered two million doses of CoronaVac and others like Malaysia, Singapore, the Philippines, Chile, etc. who have also ordered vaccines from China and are now pondering over their next move.

It was after carrying research with 12,500 volunteers in 16 scientific centers in Brazil that the Butantan Institute and the Government of Sao Paulo…