Explained: How dangerous is the new COVID variant PJ.2.1 spreading worldwide? Should we worry in India or not?

PJ.2.1 is certainly a new and rapidly spreading variant, but existing vaccines are still somewhat effective against it. PJ.2.1 does not have any unique characteristics that distinguish it from other COVID variants.

 

 

Why is alert necessary in India?

A new variant of COVID-19, PJ.2.1, is spreading rapidly around the world. The WHO issued an advisory on November 9, 2026, stating that the symptoms of this variant are very similar to those of the common cold and flu. Symptoms alone cannot determine whether the infection is caused by COVID-19 or another respiratory virus. Based on wastewater surveillance in the United States, PJ.2.1 is currently the fastest-growing variant. No confirmed cases have been reported in India yet, but experts say vigilance and testing are the key tools.

So what is this virus, where is it spreading, and is there any need to be afraid of it while living in India or not...

 

PJ.2.1: What the hell is that?

PJ.2.1 is a new lineage of SARS-CoV-2, which researchers have dubbed the "saltation variant." While common variants change gradually, with one or two mutations, the saltation variant accumulates numerous spike protein mutations in one fell swoop.

Suppose the virus underwent several 'upgrades' at once. This variant originally originated from MC.10.1.7, a descendant of the JN.1 lineage, and was in circulation until May 2025.

When and where did you first meet him?

The first case was detected in the Canadian province of Ontario on May 2, 2026. It then spread to other Canadian provinces, including Alberta, British Columbia, and New Brunswick. The first case in the United States was detected in New York City on June 30, 2026, and then spread to California, Arizona, New Jersey, Virginia, North Carolina, Missouri, Oklahoma, Colorado, and Florida.

Which countries has it reached so far?

This variant is no longer confined to North America. The presence of PJ.2.1 has also been confirmed in Singapore, Australia, New Zealand, Israel, France, and Spain. In Spain, researchers have seen clear signs of local transmission chains in various regions, such as Catalonia, the Basque Country, and Madrid, meaning it is no longer limited to imported cases.

According to data from Public Health Ontario, Canada, PJ.2.1 accounted for 25.2% of samples sequenced between September 20 and October 17, 2026. This is an increase of 16.9% over the previous four weeks.

Why is it spreading rapidly?

New variants typically spread rapidly because they evade immunity built up from vaccines or previous infection. A study published in October 2026 in the Journal of Infection suggests that this is not the case with PJ.2.1.

According to the study, the rapid spread of PJ.2.1 is due to its improved binding capacity to the ACE2 receptor. ACE2 is the 'door' through which the coronavirus enters our cells. PJ.2.1 holds this door even more tightly than before, thus increasing the risk of infection.

The researchers wrote that despite "moderate antibody evasion," its rapid spread is primarily driven by increased ACE2 binding. This means it isn't completely evading the vaccine, but rather has become more adept at its "art" of cell entry.

The WHO warns that the symptoms of COVID-19 and flu are so similar that it's not reliable to determine which virus is causing the infection based on symptoms alone. Only a proper test (RT-PCR or rapid test) can provide an accurate answer.

Some experts have also reported that PJ.2.1 is slightly more likely to cause a severe sore throat and prolonged fatigue than other variants. However, further research is needed on this matter.

Is it more dangerous?

Data so far show no evidence that PJ.2.1 causes more severe disease, increases hospitalization rates, or increases deaths compared to earlier variants. The Belarusian Ministry of Health also reports that PJ.2.1 has not led to an increase in severe cases such as pneumonia, acute respiratory distress syndrome, or respiratory failure.

Russia's Rospotrebnadzor (health regulator) has also said that this strain is not causing more severe illness or increasing the number of hospitalizations.

Dr. Asher Jamal, an emergency physician at NMC Royal Hospital, Sharjah, UAE, says, "New variants will continue to emerge, but so far there is no solid evidence that recent variants cause more severe disease, require different treatment, or pose any immediate threat. We should keep an eye on them, but there is no need to panic unnecessarily."

Will the vaccine work or not?

The good news is that antibodies from people who received the LP.8.1-adapted vaccine (which is the basis for the recent vaccine update) are also able to neutralize PJ.2.1, meaning they can block the virus. Yes, their efficacy is about 1.8 times lower than against the variant for which the vaccine was developed, but this does not mean the vaccine is useless.

Researchers have stated that PJ.2.1 has "moderate antibody evasion," meaning it has not fully penetrated immunity. This is why the WHO has not yet classified this variant as a "variant of concern" or a "variant of interest."

How worrying is this for India?

There have been no officially confirmed cases of PJ.2.1 in India yet. The Union Health Ministry has not issued any new advisories. However, the WHO has warned that this variant has reached many parts of Asia, so India should also pay close attention to testing and surveillance.

Speaking to The Indian Express, Dr Harish Chafle, Senior Consultant Chest Physician, Gleneagles Hospitals, Parel, Mumbai, said that the spread of PJ.2.1 should not be considered a cause for “immediate alarm” but for “close monitoring”.

What is WHO asking to do?

The WHO states that diagnostic testing should be conducted when treatment decisions or public health measures depend on the test results. Symptoms alone cannot be used to determine whether an infection is caused by COVID-19 or another respiratory virus.

The WHO's Technical Advisory Group (TAG-CO-VAC) is active on this variant. In a statement issued on October 27, 2026, it asked researchers and vaccine manufacturers to provide data on the genetic evolution, antigenic characteristics, and safety of existing vaccines for several emerging variants, including PJ.2.1. This data will be used at a meeting in December 2026 to consider updating vaccine composition.

What should you do in the meantime?

For now, just do 4 things:

• Get tested if you notice symptoms: Even if you feel like you have a cold or flu, get tested for Covid, especially if you are in contact with the elderly or people with weakened immunity.
• Mask in crowded and closed places: If you are going to a crowded place, it is a good habit to wear a mask.
• Keep washing your hands: Frequently washing hands with soap or using hand sanitizer is a basic but effective method.
  Pay special attention to the elderly and sick: If you have an elderly person, heart or lung disease, or a weakened immune system, protect them from crowds and consult a doctor immediately if you experience symptoms.