@InfectiousDz I don't understand why someone risking disqualification from potentially a once-in-a-lifetime event wouldn't do better than a KN95.
@传染病我不明白为什么有人冒着被取消资格的风险参加可能是一生中只有一次的活动，却不会比KN95做得更好。
@InfectiousDz I don't understand why someone risking disqualification from potentially a once-in-a-lifetime event wouldn't do better than a KN95.
@传染病我不明白为什么有人冒着被取消资格的风险参加可能是一生中只有一次的活动，却不会比KN95做得更好。