New variant of Covid-19 PJ.2.1

Many variants of corona virus have emerged in recent years. Currently, a new variant of COVID-19, PJ.2.1, is in the news, which is spreading in North America and other regions. This variant was first identified in Ontario, Canada in May 2026. Is this variant dangerous? Can it affect your immunity? Many such questions are arising in the minds of people. Come, let us know about this new variant in detail.

There are significant changes in the spike protein of this variant. The spike protein is the element that helps the virus enter human cells. The World Health Organization (WHO) has warned that the symptoms of COVID-19 can be similar to those of influenza and other respiratory infections, so it may be difficult to identify the disease based on symptoms alone. However, it is necessary to keep an eye on the increasing number of cases of PJ.2.1. Currently, there is not enough evidence to prove that this variant can cause more severe disease than earlier variants.

Features of PJ.2.1 variant

What is the new Corona variant PJ.2.1?

PJ.2.1 is a new strain of corona virus, which researchers know as saltation variant. This variant has emerged with several major genetic changes at once. The first case of PJ.2.1 was reported in Ontario on May 2, 2026. Subsequently, cases were also reported in other provinces of Canada such as Alberta, British Columbia and New Brunswick.

In the US, the first case of PJ.2.1 was detected in New York City on June 30. Subsequently, cases were also reported in several other states including California, Arizona, New Jersey, Virginia, North Carolina, Missouri, Oklahoma, Colorado and Florida.

Is the spread of PJ.2.1 possible?

Can PJ.2.1 spread?

Research has found that PJ.2.1 binds more effectively with the receptor 'ACE2' present on the surface of human cells. In laboratory tests, researchers observed that PJ.2.1 did not have much ability to evade antibodies, especially in people who were given the LP.8.1-adapted COVID-19 vaccine. The antibodies formed in his body were capable of neutralizing PJ.2.1. Compared to the LP.8.1 variant, the antibody's effectiveness in neutralizing PJ.2.1 was only 1.8-fold lower. This indicates that the main reason for the spread of this variant may not be avoidance of antibodies, but its strong binding to the ACE2 receptor. These tests were conducted on lab models.

Symptoms of PJ.2.1

What are the symptoms of PJ.2.1?

The symptoms of PJ.2.1 are not yet clear. The World Health Organization has considered it similar to the common symptoms of Covid.

• chills, fever




• phlegm




• sore throat




• runny nose




• Headache




• muscle and body pain




• weakness and fatigue

Some individuals may have difficulty breathing or stomach problems. The disease cannot be identified on the basis of symptoms alone, as these symptoms can also be those of flu. PCR test can be done to detect corona virus. Additionally, the rapid antigen test can detect the proteins of the virus. Confirmation of PJ.2.1 requires genome sequencing.