@CNN: The longer astronauts spend in space, the more likely they are to have viruses like herpes, chickenpox and shingles reactivate, according to new NASA research https://t.co/b8wUeNAHIW https://t.co/Op8EMEKVu8

@CNN: The longer astronauts spend in space, the more likely they are to have viruses like herpes, chickenpox and shingles reactivate, according to new NASA research https://t.co/b8wUeNAHIW https://t.co/Op8EMEKVu8