The key to safe airflow for planes before takeoff

Airflow limits coronavirus transmission inside an airplane. So what happens if the air isn’t flowing?

There are rare times when air circulation is off and passengers are on board, and experts say they may be dangerous, though masks offer additional protection.

As crowds return to the skies and cabins again get more packed, it’s important for passengers to pay attention to the temperature and noise of the cabin. If it’s unusually quiet and the air feels stuffy, you should avoid taking masks off, even for a sip of coffee or water, and complain to flight attendants quickly.