A new variant of the coronavirus, PJ.2.1, has been found in several countries. Changes in its spike protein have raised concerns among scientists. Learn about its symptoms, risks, vaccine efficacy, and the infection situation in India.
New variant of Corona
The coronavirus is once again in the news for a new variant. This time, scientists are focusing on a new variant called PJ.2.1, which has several changes in the virus's spike protein. This protein helps the coronavirus attach to and enter human cells. Scientists are trying to understand how quickly this variant can spread and how much impact existing immunity will have on it.
PJ.2.1 was first detected in Ontario, Canada, in May 2026. Subsequently, reports of its presence emerged in parts of the Americas, Europe, Asia, and Oceania. As it spreads, questions have arisen about whether another wave of COVID-19 could occur. Will older vaccines be effective against this new variant? Is it more dangerous than older COVID-19 variants? Let's find out.
What is the new variant of Corona PJ.2.1?
PJ.2.1 is a new variant of the coronavirus, SARS-CoV-2. It has emerged with some genetic changes from older variants of the virus. According to scientists, it belongs to the MC.10.1.7 lineage, which was previously associated with JN.1.
A study on this variant was published in the Journal of Infection in October 2026. German scientist Markus Hoffmann and his team studied the transmission patterns of PJ.2.1 and the behavior of its spike protein. It revealed that PJ.2.1 has certain changes that may help it bind to human cells.
Why are changes in spike proteins raising concerns?
The coronavirus has a thorn-like structure on its outside, called a spike protein. This protein helps the virus reach human cells and attempt to enter them. In fact, a receptor called ACE2 is present on the surface of human cells. The coronavirus's spike protein binds to this receptor, creating a pathway for entry into the cell.
According to researchers, this may make it easier for the virus to enter certain cells. In lab tests, particles containing the spike protein of PJ.2.1 showed approximately 1.5 to 2.5 times greater penetration capacity into some cells than other variants.
Will the corona vaccine be ineffective on the new variant?
The biggest question regarding PJ.2.1 is the protection provided by the vaccine. Due to changes in the spike protein, there are concerns that the body's existing antibodies may be less able to recognize this variant. However, initial research results are somewhat reassuring. According to a study published in the Journal of Infection, PJ.2.1 was found to be less able to evade vaccine-derived antibodies than many other variants.
Is the PJ.2.1 variant more dangerous than before?
The rapid spread of a virus and the severity of the disease it causes are two different things. While PJ.2.1 has shown early signs of increased cell-binding ability, there is no evidence that this variant causes more severe disease than previous variants.
Has the new variant of Corona reached India too?
Cases of PJ.2.1 have been found in parts of the United States, Canada, Europe, Asia, and Oceania. Its presence in India has not yet been confirmed. The INSACOG (Indian SARS-CoV-2 Genomics Consortium) network works to identify and monitor new coronavirus variants in India. Under this network, samples of COVID-19 are collected from different states and their genomes are sequenced.
