I think this is a great blog with lots of useful information about clean air. Do you know if there is any data on using Air Purifiers in a classroom to reduce the risk of transmission of coronavirus or influenza? I a doctor on a committee to help our school decide how to get back to class safely in the fall. Do you think an air purifier in each room would be beneficial? It seems like it would, but I don’t know where to find science backed data.