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
Quarantine Act 1721 some further provisions are necessary to be made, in case it should please Almighty God to permit these kingdoms to be afflicted with the plague; for remedy thereof; be it enacted. which is right In simpler terms, this act made it mandatory for all ships and crew to undergo a complete quarantine of the ship’s cargo and crew to determine whether there was a threat to public health. If the ship was infected by a disease and the captain or any of the crew members knew and hid the information, they were subject to capital punishment. If a crew member