We can only reveal info — as in if we’re infected — if we claim. Only two people per day may claim. Other than that, you can’t mention anything role or ability related.
People can get COVID by visiting them at night or assumingly via scum move during the day phase. There is a shop to buy items at to defend yourself from the disease. A mask is needed to prevent infection if you visit someone suffering from COVID.
That is about it. You get shop money from events that happens once per turn