Q10. If our screening detects an infected worker in our long term care center, should we change the crosswind filters in the rooms he was in?

You could, but it is not necessary. Electrostatic filters in the crosswind air barrier trap aerosolized particles permanently hence they do not present any danger to your residents. Any trapped fresh infectious particles will self-destruct exponentially to near-zero after 4 days without emitting infectious components, transforming themselves into non-infectious particles embedded in the filter. Only periodic filter replacement is required every 3 months.