Emerg Infect Dis. 2021 Feb;27(2):666-669. doi: 10.3201/2702.204480.
We conducted 3 population-based cross-sectional surveys, at 1-month intervals, to estimate the prevalence and time-trend of severe acute respiratory syndrome coronavirus 2 infection in Puducherry, India. Seropositivity rate increased from 4.9% to 34.5% over 2 months and was 20-fold higher than the number of diagnosed cases of infection.
我们进行了 3 项基于人群的横断面调查，间隔 1 个月，以估计印度本地治里严重急性呼吸综合征冠状病毒 2 感染的流行率和时间趋势。在 2 个月内，血清阳性率从 4.9%上升到 34.5%，比感染确诊病例数高出 20 倍。
