It has been seven years since the central air conditioning system worked at the New York City middle school where Lisa Fitzgerald O’Connor teaches. The danger, Nardell said, is from ineffective systems that don’t remove floating viruses and let them linger in classrooms after they are expelled in an infected person’s breath, sneeze or cough.
source https://news.yahoo.com/schools-mull-outdoor-classes-amid-050846410.html
0 comments: