That is a myth that you picked up here.
Ships being quarantined included the entire crew.
Towns that were similarly quarantined, included the entire town.
Homes that were quarantined included the entire family.
You might want to stop believing the crap spewed on FR by idiots using words they do not understand. Educate yourself. Discover if the statements or true—or do they just sound good.
Nope. Not a myth in the slightest. Farmers do it with their herds and we are the same. Get a grip man