Let me disagree with you. A sick person is a definition invented by doctors. And by and large this concept is conditional. A person is a priori healthy. And if you have something sick it is not a reason, say that you are sick. The device of a person is very difficult and it is not divorced from actuality and the surrounding world. Of course, he can catch the virus and not cope with the protection from its impact. And the fight against the virus may not be easy. This is not a bun to eat! But a healthy organism does not require additional means, it solves its problems.
Of course, if you are rich, then you can not do without drugs.
But I believe that there are tablets that people use as "candy"