gives the Commonwealth power to legislate with respect to quarantine--that power is generally concurrent rather than exclusive. As a result, both the Commonwealth and the states can enact quarantine laws, with Commonwealth law prevailing in cases of inconsistency.

Etymology and terminology

The word quarantine comes from quarantena or quarantaine, meaning "forty days", used in the Venetian language in the 14th and 15th centuries and also in France. The word is designated in the period

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