It can mean group or set of forty. Period or cycle of forty days. It also means isolation, confinement, confinement, incommunicado. Isolation period . Refers to the period of time that a patient should be isolated to avoid spreading to others or while confining the population to avoid contagion. It can not necessarily be 40 days, as it is taken as is the incubation time of the virus. The term is also used in Veterinary Medicine.
1st_ Female quartet. 2nd_ Set that is in group of forty . 3o_ For the above, time of 40 days of isolation to prevent an organism with a possible pathogen from infecting others. Today the period of transmission of diseases is better known and a quarantine may have another duration, keeping its original name.