Remember when you were a kid and one of your pals caught, measles or something. next thing you know their maws having a measles party and you were top of the invite list if you had never had the measles.
Simple, everyone stock up with 1 month of food, go round to a pals house, have a two week session, good tunes, box sets or even a board game or two. Then if someone comes down with the virus on day 12, you're all sorted coz you brought 1 months worth of supplies ð