They also use Astra Zeneca. Mutations probably plays a part here, I heard that Astra Zeneca is not effective against all the mutations. Probably the same applies to Sinopharm.
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They also use Astra Zeneca. Mutations probably plays a part here, I heard that Astra Zeneca is not effective against all the mutations. Probably the same applies to Sinopharm.
Indeed it is definitely possible. They got the 2 vaccines that are the least efficient against mutations and even “basic” covid-19