Beijing’s leading vaccine developers, private biopharmaceutical firm Sinovac Biotech and state-owned Sinopharm, have shipped hundreds of millions of doses worldwide and are key to the World Health Organization’s COVAX scheme aimed at distributing shots to poorer countries.
China’s indigenously developed vaccines, studies show, offer a measure of protection and are still considered to be highly effective against severe disease and hospitalization. They also are more easily stored and transported than certain Western-made jabs, making them comparatively cost-effective.
But it is increasingly less clear how well Chinese shots protect against more transmissible Covid-19 variants, not least the fast-spreading Delta strain that is now causing runaway caseloads and pushing regional health systems to the brink of collapse. Emerging data shows diminishing efficacy levels against variants in several major Covid-19 vaccines.
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Nile Bowie is a journalist and correspondent with the Asia Times covering current affairs in Singapore and Malaysia. He can be reached at nilebowie@gmail.com.