@Bob_Wachter If we take the UCSF number (5700/100k) as a sum over 15 days (i.e. infected will test positive for 15 days), the ratio between actual infections and reported cases (55/100k) is about 7x. If asymptomatic period is shorter, ratio is higher, perhaps approaching NY study of 30x.
@Bob\u Wachter如果我们将加州大学旧金山分校的数字（5700/100k）作为15天内的总和（即感染者将在15天内检测呈阳性），那么实际感染与报告病例（55/100k）之间的比率约为7倍。如果无症状期较短，比率较高，可能接近纽约研究的30倍。