New York City imposed an updated mask advisory Monday that strongly recommends people wear masks indoors, Mayor Bill de Blasio announced, the first instance of new local COVID-19 measures being enacted in the U.S. in response to the omicron variant—even before any domestic cases linked to the strain have been reported. READ MORE: https://www.forbes.com/sites/alisondurkee/2021/11/29/nyc-issues-mask-advisory-due-to-new-omicron-variant/?sh=229f8da13fb2 Stay Connected Forbes on Facebook: http://fb.com/forbes Forbes Video on Twitter: http://www.twitter.com/forbes Forbes Video on Instagram: http://instagram.com/forbes More From Forbes: http://forbes.com