> As apparently people were still infectious after they felt better and left their house, causing healthy people to become even sicker than expected with the in

> As apparently people were still infectious after they felt better and left their house, causing healthy people to become even sicker than expected with the increased viral load from both pre-symptom and still recovering patients. That is not how I interpreted it. If you are out of the house, you are more likely to get a smaller dose of the infection (such as from a handrail or something), and therefore your immune system is going to have a head start on fighting it. If everyone is home on the other hand, and one person in the house gets sick, then everyone else in the house is more likely to get a higher dose of the infection due to the repeated proximity to others in the house. And therefore the infection is gaining a foothold and head start against the immune system.