COLOMBO (News 1st); State Minister Prof. Channa Jayasumana says that the effectiveness of some of the world’s leading COVID-19 vaccines has declined sharply in the last six months. Citing world renowned Science journals, which includes the results of research conducted in the United States on the effectiveness of vaccines, the State Minister said that the efficacy […]
Is the efficacy of leading vaccines decreasing? Govt urges people to follow guidelines
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