New guidance released by the CDC on Tuesday says they're recommending masks again for vaccinated people indoors in some areas due to the rise in COVID-19 infections.

Health experts have been calling this new wave of COVID cases the "pandemic of the unvaccinated." The delta variant is causing an uptick in COVID cases across the state and the country, but whether you have received the COVID-19 vaccine or not, the CDC is suggesting you mask back up.

Public health experts believe the very contagious delta variant is behind most of those cases. So, in areas where COVID transmission is considered substantial or high, the CDC recommends everyone to mask back up.

For those who are fully vaccinated, health experts say getting infected with the delta variant is rare, but it can still happen, and those that are vaccinated and get COVID can spread it to others.

For anyone immunocompromised or at a higher risk of getting sick, the CDC says they should follow prevention protocol like wearing a mask, staying six feet from others and avoiding crowds and poorly ventilated spaces.

They are suggesting teachers, staff and students wear masks no matter what their vaccination status is.

"Based on the mortality of the virus, I do not think this is being overly cautious. I think it is prudent to do that now better than later. I think we need to move forward with more information and positive reinforcements about getting the vaccine in people who have been hesitant in the past," says Dr. Guido Macchiavello, director of ambulatory care at St. Barnabas Hospital.

In New York City, masks aren't required in most situations for the fully vaccinated. Gov. Andrew Cuomo announced Tuesday that he will be reviewing the CDC's new guidelines along with state and federal health experts for how New York will be moving forward.