Originally Posted by
Green.Dot
As for changing guidance, have you ever decided to make a change to a previous decision you made on the flight deck due to change in circumstance?
Exactly. Here’s a great article on why the recommendations for mask wearing have changed throughout the course of the pandemic.
How Masks Went From Don’t-Wear to Must-Have
Basically more knowledge was gained over the first few months about the nature of transmission of the virus. There were also concerns at the start the panic buying of the existing low stocks of PPE would deny supply to medical workers and vulnerable people.
Thats what science is, the ability to change understanding based on observation of evidence.