Student or Learner
(Talking about a pet)
Speaker 1: Even the people at the shop told me: "You have to basicly quarantine it, so that you don't get it sick...because it's only one pound".
Speaker 2: And how much would the quarantine last?
Speaker 1: It lasts until they have all their shots.
I can't understand what those shots they are talking about are. Might they be referring to vaccinations?
Thank you in advance
Congratulation on an excellent piece of deduction!
Very common and very colloquial. It is based on this medical definition:
shot (sht)n.1. A hypodermic injection.
2. A small amount given or applied at one time.