Re: Take a lesson from Athletics?
This is a ludicrous idea. It's obvious what we do.
Every couple of months we inject one astronaut with a different disease. Say the common cold. This gives a nice work-out for all their immune systems. We then pack them a box of hot honey and lemon drinks plus tissues or perhaps a small hoover to clip over the nose and hoover up the bogey to avoid it floating around the ISS... You know it makes sense.