Spaceflight activates herpes virus in astronauts, study finds

Have you ever developed a cold sore after a stressful time at work or home?That's a herpes virus re-activating and the same thing happens to astronauts.New NASA research shows more than half the astronauts who return from space come home with re-activated herpes viruses.They think it’s because of all the stress they undergo like: zero gravity, cosmic radiation, and separation from loved ones.The longer they are in space, the more likely the viruses are to re-activate.There are many differe