How long can it hide?NIAIDBy Debora MacKenzieThe Ebola virus can persist in a man’s semen for much longer than we thought. A man in Guinea who survived Ebola in 2014 is now known to have carried it for at least 531 days. Earlier this year, he transmitted the virus sexually, causing it to spread to at least 10 people, and killing 8 of them. Ebola virus...