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Home » News » The world to shutdown again as new virus spreads

The world to shutdown again as new virus spreads

December 20, 2023
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A new variant of the virus that causes COVID-19 is rising to prominence in the U.S. as winter illness season approaches its peak: JN.1, yet another descendent of Omicron. Also the virus has been detected in India.

The World Health Organization has classified the COVID-19 variant JN.1 as a separate variant of interest from the parent lineage BA.2.86 due to its rapidly increasing spread.

JN.1 was first detected in the U.S. in September but spread slowly at first. In recent weeks, however, it has accounted for a growing percentage of test samples sequenced by labs affiliated with the U.S. Centers for Disease Control and Prevention (CDC), surpassing 20% during the two-week period ending Dec. 9.

By some projections, it will be responsible for at least half of new infections in the U.S. before December ends.

“Despite this, with the onset of winter in the Northern Hemisphere, JN.1 could increase the burden of respiratory infections in many countries,” the WHO said in a statement.

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But the agency has not labeled JN.1 a variant of concern—that is, a new strain of the SARS-CoV-2 virus with potential for increased severity; decreased vaccine effectiveness; or substantial impacts on health care delivery.

The health organization added it is continuously monitoring the evidence and will update the JN.1 risk evaluation as needed.

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Although JN.1 is now a variant of interest, the WHO said current vaccines continue to protect against severe disease and death in this variant, as others that are circulating.

In Canada, JN.1 falls under the variant BA.2.86, which is an Omicron subvariant of SARS-CoV-2. Its prevalence has been steadily increasing since October, when it made up 0.1 per cent of the variants at the time.

According to the Public Health Agency of Canada (PHAC), as of December 10, it now accounts for 27.4 per cent of COVID-19 variants.

In a statement to Global News, a spokesperson for PHAC called JN.1 “the most established BA.2.86 sub-lineage globally and in Canada.”

“Continued monitoring and evaluation is taking place to determine if JN.1 requires further reclassification to a variant of interest in Canada,” the statement said.

Here’s what to know about JN.1.

Is JN.1 more infectious or severe than other SARS-CoV-2 variants?

JN.1 is closely related to BA.2.86, a fellow Omicron descendent that first popped up in the U.S. this past summer. The two variants are nearly identical, according to the CDC, except for a single difference in their spike proteins, the part of the virus that allows it to invade human cells.

The fact that JN.1 is responsible for a growing portion of infections suggests it is either more contagious or better at getting past our bodies’ immune defenses than previous iterations of the virus, the CDC says. But right now there is no evidence that it causes more severe disease than other viral strains, even though it may cause a bump in transmission, the CDC says. Primary symptoms are likely to be the same as those from previous variants: a sore or scratchy throat, fatigue, headache, congestion, coughing, and fever.

Do vaccines, tests, and treatments work against JN.1?

So far, the signs are positive. COVID-19 tests and treatments are expected to be effective against JN.1, the CDC says. And even though the latest COVID-19 booster shot was designed to target the XBB.1.5 variant, preliminary research suggests it also generates antibodies that work against JN.1, albeit fewer of them. (As ever, vaccines will not totally block JN.1 infections, but should reduce the likelihood of death and severe disease.)

In a Dec. 13 statement, WHO’s expert COVID-19 vaccine advisory group recommended sticking with the current XBB.1.5 vaccines, since they seem to provide at least some cross protection.

Will JN.1 cause a COVID-19 surge in the U.S.?

The CDC no longer logs every single COVID-19 diagnosis in the U.S., but other indicators of disease are up. Wastewater surveillance data suggest there’s a lot of COVID-19 going around, particularly in the Northeast. Hospitalizations are also on the rise, although far fewer people are being admitted than at this time last year. Death rates are currently stable, though they tend to lag slightly behind hospitalizations.

It’s too soon to say whether JN.1 will cause a significant spike in cases, although its ascendance during the busy holiday travel and gathering season could fuel increased transmission. “Right now, we do not know to what extent JN.1 may be contributing to these increases or possible increases through the rest of December like those seen in previous years,” the CDC wrote in a Dec. 8 update on the variant.

The best defenses against JN.1—and other variants of SARS-CoV-2—remain getting vaccinated, masking in crowded indoor areas, and limiting exposure to people who may have been infected.

Tags: JN.1SARS-CoV-2 variants
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