Question: what benefits does it have to know the original source of a virus?

Sarah Montgomery answered on 16 Jun 2020:

It helps us know what to do differently next time to avoid another pandemic. It could also tell us how fast the virus spreads, and how. Did it start spreading because everyone handled the same piece of contaminated food, or did it get into one person’s blood and then spread between people?

Food is still being transported between countries despite the lockdown, so if it turns out you can get coronavirus just from eating something, we need to do something about that very soon.