@apmalong It's also mostly not that effective if you're trying to apply it at a point location. e.g. rapid tests w/high false negative, incorrect *real world* mask usage resulting in << 100% protection. You really need the network effect of reducing/removing circulation to get to "zero".
@apmalong 如果您尝试在某个点位置应用它，它也大多不是那么有效。例如快速测试，高假阴性，不正确的*现实世界*面具使用导致