@daveshow6 @jsparklin27 @JeromeAdamsMD @Kbrady04 If you were in Korea buying them, then sure. But in the US you are at the mercy of dodgy importers and resellers. Several counterfeits and underperforming products have identified (and there are certainly others not identified) but less commonly than KN95s.
@daveshow6@jsparklin27@JeromeAdamsMD@Kbrady04如果你是在韩国买的，那当然。但在美国，你却任由狡猾的进口商和经销商摆布。已经发现了一些假冒产品和性能不佳的产品（当然还有其他一些未被发现），但比KN95更不常见。