China is considering mixing different COVID-19 vaccines to improve the relatively low efficacy of its existing options, a top health expert told a conference in Chengdu on Saturday.
Authorities have to “consider ways to solve the issue that efficacy rates of existing vaccines are not high,” Chinese media outlet The Paper reported, citing Chinese Center for Disease Control and Prevention Director Gao Fu (高福).
His comments mark the first time a top Chinese expert has publicly alluded to the relatively low efficacy of the country’s vaccines, as China forges ahead in its mass vaccination campaign and exports its jabs around the world.
Photo: AP
China has administered about 161 million doses since vaccinations began last year — most people require two shots — and aims to fully inoculate 40 percent of its 1.4 billion population by June.
Many have been slow to sign up for jabs, with life largely back to normal within China’s borders and domestic outbreaks under control.
Gao has said that the best way to prevent the spread of COVID-19 is vaccination, and said in a state media interview that China aims to vaccinate 70 to 80 percent of its population between the end of this year and the middle of next year.
An option to overcome the efficacy problem is to alternate the use of vaccine doses that tap different technologies, Gao said at the conference.
This is an option that health experts outside China are studying as well.
Experts should not dismiss the use of messenger ribonucleic acid (mRNA) vaccines just because there are already several coronavirus jabs in the country, The Paper cited Gao as saying.
None of China’s jabs conditionally approved for the market are mRNA vaccines, but products that use the technology include those by US pharma giant Pfizer and German start-up BioNTech, as well as by Moderna.
China has four conditionally approved vaccines, whose published efficacy rates remain behind rival jabs by Pfizer-BioNTech and Moderna, which have 95 percent and 94 percent rates respectively. China’s Sinovac previously said trials in Brazil showed around 50 percent efficacy in preventing infection and 80 percent efficacy in preventing cases requiring medical intervention.
Sinopharm’s vaccines have efficacy rates of 79.34 percent and 72.51 percent respectively, while the overall efficacy for CanSino’s stands at 65.28 percent after 28 days.
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