Quarantine "yellow jack" but this was also a name for yellow fever, which probably derives its common name from the flag, not the color of the victims (cholera ships also used a yellow flag). The plain yellow flag ("Quebec" or Q in international maritime signal flags) probably derives its letter symbol for its initial use in "quarantine", but this flag in modern times indicates the opposite—a ship that declares itself free of quarantinable disease, and requests boarding and routine port inspection. Australia has perhaps the world's strictest quarantine standards. Quarantine in northern Australia is important because of its proximity to South-east
Mobile Quarantine Facility personally welcomed them back to Earth aboard the recovery ship USS "Hornet" after splashdown. The trailers housed the three crew as well as a doctor and an assistant for cleaning and cooking. Four MQFs were built for NASA: The quarantine requirement was eliminated following Apollo 14 once it was proven the moon was sterile and that the facilities were therefore unnecessary. Mobile Quarantine Facility The Mobile Quarantine Facility (MQF) is a converted Airstream trailer used by NASA to quarantine astronauts returning from Apollo lunar missions for a duration of 21 days. Its purpose was to prevent the spread of any