New COVID Variant Makes A Holiday Appearance: What To Know In CT

CONNECTICUT — Data for COVID-19 illnesses related to a new subvariant, JN.1, is incomplete for Connecticut and the rest of New England for December, but coronavirus hospitalizations are increasing slightly as families gather for the winter holidays.

The new variant is emerging as another, HV.1, remains dominant, according to public health officials. Centers for Disease Control and Prevention data shows COVID-19 hospitalizations were up 1.55 percent nationwide for the two-week period ending Dec. 9. JN.1, which emerged in August, represented more than 21 percent of new cases, but HV.1 was still the dominant coronavirus strain in the United States, causing more than 29 percent of cases.

According to data from the CT Department of Public Health, COVID-19-associated hospitalizations have increased slightly throughout December, with 322 the week ending Dec. 2, 330 the week ending Dec. 9, and 340 the week ending Dec. 16.

So far this week, there have been 1,230 reported COVID-19 cases, 636 flu cases and 469 RSV cases, according to data from the state health department. Two weeks ago, 2,686 COVID-19 cases had been reported, 1,071 flu cases and 1,201 RSV cases. Since Oct. 1, 20,330 COVID-19 cases have been reported in Connecticut, 8,345 RSV cases and 4,302 flu cases.

Importantly, fewer people were hospitalized for COVID-19 than at this time last year in the U.S., and nowhere near the peak of 150,650 hospitalizations on Jan. 15, 2022.

Still, public health officials are worried about JN.1 as the number of people who have gotten the updated vaccine remains low. The CDC expects the booster to protect against the JN.1, and new COVID tests should detect it and other strains.

CDC data on vaccine coverage in Connecticut shows an estimated 21 percent of residents 18 years and older are vaccinated with the updated 2023-2024 COVID-19 vaccine.

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The CDC says there’s no evidence the symptoms of JN.1 are more severe than for other strains, and the severity of illness usually depends on the person’s immunity. While symptoms don’t change much as the virus mutates, this one in particular evolves quickly, raising concern it may be better at evading immune systems, according to Yale Medicine.

The variant evolved from BA.2.86, or Pirola, an Omicron variant. Noting the number of changes to its spike proteins — more than 30 — scientists worried last summer it might mutate beyond the capacity of vaccines and antibodies to fight it.

The first U.S. cases of JN.1 were reported in September. The number of cases increased from 3.5 percent in mid-November to the current 21 percent, according to the CDC estimates.

The increase comes as two other respiratory illnesses, seasonal influenza and RSV, are also increasing hospitalizations. The best thing families can do as they gather for the holidays is to make sure everyone is vaccinated although it usually takes a couple of weeks for protection to develop.

Also, experts advise, people who have symptoms should stay home. If that’s not possible, consider masking. Hosts should arrange seating to allow for social distancing if possible, encourage hand-washing and strategically place hand sanitizer and tissues in areas where guests will be gathering.