Respirators have already become very popular, but don't forget there is a 'magical' medicine called Isatis indigotica Fort, in Chinese is "板蓝根". I think almost all Chinese know that medicine because when you got cold, felt headache and some disease was attacking your country. Your parents probably will searh that medicine in drawers and put it in water, and let you drink it. Anyway, my mum always did that before.
But, is that medicine really a 'magical' medicine. Obviously not, because I never feel better after I drunk it. And, I also search some information online, this medicine only clearing heat, and also, defense some disease but not every disease. Unfortunately, if you drink too much, it also will be bad for your body, so the conclusion you know.
No medicine can be omnipotent.
_David