@fmokren @DataDrivenMD Presymptomatic people have always been infectious for a day or so before symptoms. That's close to the most contagious period, with high measured viral load.
Asymptomatic people who just barely test positive briefly but never reach a high viral load is not the same thing.
@fmokren@DataDrivenMD症状前患者在出现症状前一天左右一直具有传染性。这接近最具传染性的时期，病毒载量很高。
无症状的人只是短暂的检测呈阳性，但从未达到高病毒载量，这不是一回事。