Welcome to sick season.

According to the CDC, New York City — along with New Jersey and at least 16 other states — is now experiencing “high” to “very high” levels of respiratory-illness activity as measured by the number of weekly visits to health-care providers and emergency rooms by people having symptoms of fever, cough, and sore throat.

The culprits are the usual suspects: this year’s strains of influenza, COVID, and RSV. And though flulike-illness levels have been above baseline nationally for several consecutive weeks, the CDC warns that we still haven’t hit the peak.

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As always, seniors remain the most at-risk demographic for severe outcomes from respiratory illnesses, which is why the low vaccination rates for that group remain troubling.

Beyond vaccination, for everyone, the best way to prevent the spread of respiratory illnesses like the flu and RSV is regular handwashing; avoiding touching your eyes, nose, and mouth; and staying home if you get sick. High-filtration face masks still work great, too, and not just for avoiding COVID.