> 2. They nearly-immediately went to the market, and spent significant time there to get the place loaded up with the virus
Wouldn't it be enough to just go there, buy some food, caugh on a few of the workers there, and they'd spread the thing around to other shoppers in the next few days?
2 was meant to be in coordination with 3 -- the initial outbreak was at the market, so the researchers need to do two things: go to the market enough to infect people there, and not go other places to infect people elsewhere.
Wouldn't it be enough to just go there, buy some food, caugh on a few of the workers there, and they'd spread the thing around to other shoppers in the next few days?