COVID-19 variant PJ.2.1 spreads across multiple countries

A new COVID-19 variant, PJ.2.1, first identified in Ontario, Canada, in May 2026, is spreading rapidly across North America, Europe, Australia, and Asia, raising concerns about potential new infection waves. Early research published in the Journal of Infection suggests the variant's increased spread is likely linked to its enhanced ability to bind to the ACE2 receptor, rather than an improved capacity to evade vaccine-induced antibodies. Antibodies from people vaccinated with the LP.8.1-adapted vaccine remain effective at neutralizing PJ.2.1. The World Health Organization notes COVID-19 symptoms can mimic influenza, making symptom-based diagnosis unreliable. While PJ.2.1 is being monitored, there is currently insufficient evidence to confirm it causes more severe illness than previous variants.