China has spent over a year developing Pfizer-type Covid-19 vaccines that may even help it pivot from stringent “zero-Covid” restrictions, but a changed market and the Omicron variant have muddied prospects before efficacy data has even been published.
Still, China is unlikely to join the majority of countries in approving foreign-made vaccines based on messenger RNA (mRNA) technology before making its own, experts said, though a slowing vaccination drive at home and in some other nations and improved supply of approved vaccines have raised questions of viability.
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