In the midst of uncertainty surrounding the efficacy of COVID-19 vaccinations against the Omicron variant, the Commissioner of Health & Mental Hygiene of the City of New York has issued an advisory that masks should be worn in most indoor and public settings. The advisory applies regardless of vaccination status or past COVID-19 infections, and covers building lobbies, offices, stores, and other common or shared spaces such as restrooms, hallways, elevators, and meeting rooms. However, it does not apply when an activity inconsistent with mask wearing is being performed, such as eating, drinking, or delivering a speech to an audience seated at least six feet away.