Unfortunately historically, quarantines have never worked. At best they slow down the progression allowing time for resources to be brought to bare, but they have never proven successful in eliminating the spread.
I seem to recall the best on record was when the Venetians required a 40 day waiting period prior to deboarding and confirmation at anchor in harbor for any ships coming into port from potentially infected areas and even that was not 100%.
WWG1WGA
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)