IMO, dirty hands are still the primary vector for someone to get infected, and so even if you’re in an environment where COVID is already in the house, there is

IMO, dirty hands are still the primary vector for someone to get infected, and so even if you’re in an environment where COVID is already in the house, there is still merit to reducing the likelihood of you getting the disease by washing your hands. It’s all about reducing the odds. Nothing is perfect. But you can at least increase your chances of not getting infected.