Pushback is happening over vaccine requirements and mask mandates.
The United States is facing a COVID-19 surge this summer as the more contagious delta variant spreads.
More than 615,000 Americans have died from COVID-19 and over 4.2 million people have died worldwide, according to real-time data compiled by the Center for Systems Science and Engineering at Johns Hopkins University.
Just 58.4% of Americans ages 12 and up are fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
The CDC last week, citing new science on the transmissibility of the delta variant, changed its mask guidance to now recommend everyone in areas with substantial or high levels of transmission -- vaccinated or not -- wear a face covering in public, indoor settings.
Denver is mandating vaccinations for city employees and those in high-risk jobs like first responders, correctional workers and school personnel. The mandate also applies to staff at long-term care facilities, shelters and hospitals.
Seventy percent of adults in the U.S. have now had at least one vaccine dose, the White House announced Monday, nearly one month after President Joe Biden hoped to reach the milestone.
Biden said in May, "Our goal by July 4th is to have 70% of adult Americans with at least one shot and 160 million Americans fully vaccinated." When that date finally rolled out, the White House touted that 70% of Americans ages 27 and up met the goal, but low vaccination rates among young people kept the country from fully meeting the target.
Biden is scheduled to give remarks on vaccination progress on Tuesday.
-ABC News’ Sarah Kolinovsky
At least one COVID-19 patient was checked in every hour Monday morning at Our Lady of the Lake Hospital in Baton Rouge, Louisiana, hospital officials told ABC Baton Rouge affiliate WBRZ.
The hospital said Monday it has 301 unvaccinated COVID-19 patients and 52 vaccinated COVID-19 patients.
Our Lady of the Lake Hospital is among 45 hospitals in the state requesting extra staff, reported WBRZ.
Louisiana is recording a "remarkable increase in the number of newly vaccinated people," White House COVID-19 data director Cyrus Shahpar tweeted Monday.
Masks are now strongly recommended in public, indoor settings in New York City, even for those who are vaccinated, Mayor Bill de Blasio said Monday.
The mayor also announced that all new city hires must be vaccinated.
De Blasio noted that this week is the last week to get all children ages 12 and above fully vaccinated by the first week of school.
