How does NASA ensure that astronauts going into space for months at a time don’t get sick?

Question

I assume the astronauts are healthy, thoroughly vetted by doctors, trained in basic medical principles, and have basic medical supplies on board.

But what happens if they get appendicitis or kidney stones or some other acute onset problem?

In: 2048

Answer 1

Part of the point of the ISS is “What happens to the human body in prolonged microgravity”. They’re trying to see what happens to the human body on the timescales of longer trips in the relative safety of low earth orbit.

Ways to avoid conditions will be food supplements, exercise and picking the right people.