@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

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 pic.twitter.com/Op8EMEKVu8

— CNN (@CNN) March 18, 2019