@Liberalism2021 @alexmeshkin You don't need fit tested. Non-fit tested w/good fit is still very effective and if you gave all adults 3M Aura and guidance how to use it properly, >95% would pass a fit test.
@Liberalism2021 @alexmeshkin 你不需要适合测试。不合身测试 w/良好合身仍然非常有效，如果您给所有成年人 3M Aura 并指导如何正确使用它，