@notdred Last year's decline in January-February was precipitous and faster than many expected. It was hard to explain from an accumulated immunity (SEIR) or vaccination uptake perspective. Perhaps something similar is happening now?
@诺德雷德去年1-2月的下降速度比许多人预期的要快得多。从累积免疫（SEIR）或疫苗接种的角度很难解释。也许类似的事情正在发生？