NEW YORK (CBSNewYork) — Flu season is officially here.

The State Department of Health said the virus is now “prevalent” in New York.

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That means by law, unvaccinated health care workers must wear masks while near patients, CBS2 reported.

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The Health Department said while this year’s flu vaccine is not as effective as past years it’s still recommending anyone older that 6-months-old be vaccinated.

“Flu shots are a safe and effective way to reduce your risk for infection during flu season and I urge all New Yorkers to get one,” said Acting New York State Health Commissioner Dr. Howard Zucker.

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