Yesterday, when my son got home from an overnight in an under-ventilated dorm, our family went into our covid protection mode.
We mask inside, except when in bedroom with doors shut, and force outward airflow with fans in windows.
If he continues symptom-free and RAT-negative, we'll relax after a few days.
Our goal is to break a potential infection chain.
Few people know about this or do this. They don't talk about it. And they repeatedly get sick and then infect others with #covid .