After walking on the Moon, the Apollo 11 crew spent three weeks locked in quarantine — in case they’d brought back lunar germs — and greeted the world through glass.

After walking on the Moon, the Apollo 11 crew spent three weeks locked in quarantine — in case they’d brought back lunar germs — and greeted the world through glass.

Human spaceflight comes with enormous risks. One such problem is ensuring that astronauts do not bring back microorganisms from space that could make them sick or even cause death. There is even a small chance that some form of a pandemic could be caused by miniature creepy crawlies brought in by those who venture to the final frontier. Apollo 11 and Saturn V Exhibit at the Kennedy Space Center. Taken on 6/28/2026 by 19FortyFive.com NASA has bee…