Legionnaires do not spread from person to person, the bacteria do not live in saliva.
More @ https://bit.ly/3aFFy1l.
(Google Translate version of “[SALAH] Pemakaian Masker Menyebabkan Penyakit Legionnaires” https://bit.ly/3h7Lna6).
[FALSE] Wearing a mask causes Legionnaires disease