Question: is it hard to find cures for sick homo sapiens ?

Sajid Javed answered on 6 Nov 2017:

it can be difficult but cures are created by knowing more about how people get sick and what has to happen for someone to get sick. Once this is known then way of blocking things or teaching your immune system to recognize them quickly. for example when you are given a vaccine the things that are actually in it are broken down parts of a virus with the bits that make you ill removed. your body’s immune system learns from it and when you get the virus you body reacts quickly and it doesn’t make you ill.