Put up a new smoke screen. Winter is almost here and people are getting sick.

Mayor Eric Adams on Tuesday urged New Yorkers to mask up indoors as a spike in coronavirus, flu and respiratory syncytial virus (RSV) infection cases.

“When COVID-19 hit New York City almost three years ago, New Yorkers looked out for each other and followed the advice of our health experts,” Adams said Tuesday.

“With the holiday season in full swing and cases of COVID-19, flu, and RSV rising, we are asking New Yorkers to protect themselves and their loved ones once again. Mask up, get tested, get treated if you’re eligible, and, if you haven’t gotten your flu shot or your COVID-19 booster, we encourage you to roll up your sleeve.”

The warning comes as Adams is trying to dodge questions about why he closed a multi-million dollar migrant camp on Randall’s Island only to complain now he has no space to house the incoming illegal aliens.

Staten Island Councilman Joe Borelli, a staunch opponent of mask mandates, said City Hall’s advisory is OK — to a point.

“You want to wear a mask? Fine. But I do not want to go back down the slippery slope of a mask mandate. There’s no appetite for it,” said Borelli, the council’s Republican Minority Leader.

Despite Borelli’s warning you hear far-left progressive officials calling for masks.

Public health experts said the city is taking the right approach by prodding New Yorkers to mask-up during the holidays.

“People may have been letting their guard down a bit a little too soon. The virus is still circulating. There could be consequences,” said Dr. Ayman El-Mohandes, dean of CUNY’s Graduate School of Public Health. 

“We need to learn our lesson. We don’t want people getting sick during the holidays.”

The state Health Department reported the number of flu cases jumped by 19% for the week ending Dec. 10 compared with the prior week.

Health Commissioner Dr. Ashwin Vasan recently issued a health advisory recommending city residents use high-quality masks when indoors and in crowded outdoor settings.

He said wearing masks — while not mandatory — was especially important for those who are themselves, or are meeting others, at an increased risk for complications from COVID, RSV or the flu — like people 65 and older or who are immuno-compromised.

The push also comes as Hochul and the state Health Department reported 94 New Yorkers around the state died from COVID-19 over a three day reporting period — from Saturday through Monday. That’s more than 30 a day, a high number for a post-pandemic period.

Over the past month, the city’s seven-day average of confirmed and probable cases of COVID-19 increased, as did cases of RSV, city health officials said. Data shows flu cases in the city this year are already higher than they were during the peak of the last four flu seasons.