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No, quarantine is when you isolate a group of people for a period of time. It is used to see if they MIGHT be sick, or when people are known to be sick, to allow it to burn out.

The original usage was specifically when ships were required to stay in port for 40 days before being allowed to dock, so that any sickness could burn itself out or be apparent.

You can also see the CDC definition - https://www.cdc.gov/quarantine/index.html

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Thanks for the correction. You're right that quarantine does not require knowing whether people are actually infected. However, it's still about isolating specific people or things to protect the rest of the population and not about asking the whole population to change its behavior.

In the present case, we are isolating everyone to protect everyone; and Quarantine can apply to entire populations and has.

Ie, whole towns under _cordon sanitaire_.

A sanitary cordon is not a quarantine.

The Wikipedia article for cordon sanitaire [1] mentions quarantine as an alternative way to handle disease spread.

> Public health specialists have included cordon sanitaire along with quarantine and medical isolation as "nonpharmaceutical interventions" designed to prevent the transmission of microbial pathogens through social distancing.

[1] https://en.wikipedia.org/wiki/Cordon_sanitaire

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