High anti-SARS-CoV-2 antibody seroconversion rates before the second wave in Manaus, Brazil, and the protective effect of social behaviour measures: results from the prospective DETECTCoV-19 cohort.

Lancet Glob Health · 2021 · PMC8525986 · PMID 34678195

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an increasing trendno p-value reported

6 Concurrently, a sequential serological survey of anti-SARS-CoV-2 antibodies among several Amazonian cities showed an increasing trend in seropositivity, 7 and a blood-donor-based report showed a high attack rate in the region, 8 , 9 indicating high levels of transmission.

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