https://www.bbc.com/future/article/20210114-covid-19-how-effective-is-a-single-vaccine-dose
According to Pfizer data published in December 2020, the Pfizer-BioNTech vaccine is roughly 52% effective after the first dose. Out of 36,523 participants in the phase three trial – the final stage of testing where people either received two full doses, 21 days apart, or a placebo – who had no evidence of existing infection, 82 people in the placebo group and 39 in the vaccine group developed Covid-19 symptoms.
Investigate China covid
ReplyDeletehttps://www.wsj.com/articles/the-world-needs-a-real-investigation-into-the-origins-of-covid-19-11610728316?redirect=amp#click=https://t.co/LfNtZgjkV8
That's why it's important to get both doses.
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