"This is becoming a pandemic of the unvaccinated," Walensky said, adding that 97 per cent of people entering hospitals in the United States with COVID-19 are unvaccinated. Arizona congressman Andy Biggs said transit mask rules "are only being kept in place by those who relish controlling our day-to-day lives." In mid-May, CDC said fully vaccinated people could avoid wearing masks indoors in most places – with some exceptions like transit. Air passenger traffic has picked up this month, and the CDC says mask wearing is still essential on mass transit. The CDC transit mask order has no expiration date.

Source: CBC News July 16, 2021 16:48 UTC