@michaelmina_lab @ParentMishmash A mask helps you AND others around you. Clean air also helps you AND others around you.
Tests, are a bit more of just helping others around you (unless it is the others taking the test), apart from diagnostic test to indicate treatment.
@michaelmina_lab @ParentMishmash 面具可以帮助您和您周围的其他人。清洁的空气还可以帮助您和您周围的其他人。
除了诊断测试以指示治疗外，测试更多地只是帮助您周围的其他人（除非是其他人进行测试）。