In a study of 4,000 participants, the vaccine showed efficacy of 85.3 percent 14 to 28 days after a booster vaccination.China has approved its first domestically developed mRNA vaccine against COVID-19, its manufacturer said on Wednesday, months after the relaxation of strict zero-COVID regulations sparked a surge in cases.
#people #coronavirus #development #participants #independently #instructions #manufacturer #clinical-trials #domestically #spike-protein
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