Use Google Authenticator to securely login to non-Google sites | TechRepublic
https://www.techrepublic.com/article/use-google-authenticator-to-securely-login-to-non-google-sites/
Use Google Authenticator to securely login to non-Google sites | TechRepublic
https://www.techrepublic.com/article/use-google-authenticator-to-securely-login-to-non-google-sites/
Ventilation!
opening windows, running fans; applicable to the flu too!
https://www.nytimes.com/2021/10/19/opinion/covid-flu-air-transmission.html