How effective was the beaked plague suit used by doctors during the black plague in the prevention of infecting the doctor? What was the procedure for cleaning it?

by Quadraticabacus
cchiu23

https://www.reddit.com/r/AskHistorians/comments/94fwyc/during_the_time_of_the_black_plague_there_are_the/

The famed beak suite didn't exist during the black plague and its earliest mention is in the 17th century