The flu is spreading in record numbers, according to the New York State Health Department.

“We are seeing the highest number of flu cases ever recorded in a single week in New York State,” NYS Health Commissioner Dr. James McDonald announced Friday. “We are closely reviewing hospital bed capacity data to better understand hospitalization trends and to guide any necessary response related to impacts from respiratory viral infections.”

According to the state health department, a total of 71,123 positive cases were reported for the seven days ending Dec. 20. That’s the most ever recorded in a single week since influenza was made reportable in 2004, and a rise of 38% from the previous week.

Hospitalizations due to influenza also climbed by 63 percent, up from 2,251 in the previous week to 3,666 across the state.

There have been 189,312 positive flu cases reported in New York this season to date.

The high numbers are likely due to fewer people getting the seasonal flu shot this year. Just 23.9% of New York state residents have gotten the influenza vaccine as of Dec. 24, according to state data; in Onondaga County, it’s slightly higher at 29.9%.

More than half of Americans typically get the seasonal flu vaccine, according to federal data. Dr. Kathryn Anderson, the Onondaga County health commissioner, recently said more than 40% of county residents typically get their shots by early December.

National and local vaccination rates have declined since the Covid pandemic amid skepticism over vaccines. Statewide, nearly 4 million fewer residents have gotten their flu shots at this point compared to recent years.

And infections could continue to grow as families gathered for the holidays, especially during the cold weather months. Flu season typically peaks in January, according to the state health department.

McDonald encouraged New Yorkers to protect themselves and those around them by getting vaccinated, staying home when sick, and “practicing everyday preventive measures. Flu is treatable for high-risk people with antiviral medicine, if taken within 48 hours of symptoms.”

Other tips include:

  • Wash hands often with soap and water for at least 20 seconds. If soap and water are not available, use an alcohol-based hand sanitizer.
  • Avoid touching eyes, nose and mouth with unwashed hands.
  • Avoid close contact with people who are sick.
  • Stay home when sick.
  • Cover cough or sneeze with a tissue, then throw the tissue in the trash.
  • Clean and disinfect frequently touched objects and surfaces.

“It is not too late to get vaccinated against influenza, and the flu vaccine is widely available to those 6 months and older,” the health department said Friday. “Young children, pregnant women, people with certain chronic medical conditions and those ages 65 and older are most at risk of developing serious complications from flu.”

The seasonal influenza vaccine remains the best protection against serious illness and death from the flu, the department added. Flu shots are available to New Yorkers ages 2 and older at health care provider’s office or at participating pharmacies without a prescription; children 6 months and older can receive the flu vaccine at a health care provider’s office.

For more information, visit health.ny.gov.