Comment Re:MiR? ISS? (Score 1) 177
if you keep the environment completely pathogen free , the immunity of the people there will drop significantly , since it is not being stimulated.
[Citation needed]
They would not have antibodies against anything new, but they still have resistence to everything they were exposed to before they left.
IANAMD (I am not an MD), but I don't think the immune system works like muscle mass in that respect...