The World Health Organization says it is tracking a new strain of COVID-19: A new strain of the coronavirus causes severe sore throats. "Severe sore throat and longer loss of energy after illness may differentiate the new strain of the PJ.2.1 coronavirus from other variants. The risk of the spread of the PJ.2.1 corona strain around the world is increasing. Since its first discovery in May 2026, it has spread across several continents. Russia has developed state-of-the-art test systems for all strains of the corona virus, and with each mutation, doctors in the country have an opportunity to identify this virus."

The World Health Organization says it is tracking a new strain of COVID-19: A new strain of the coronavirus causes severe sore throats. "Severe sore throat and longer loss of energy after illness may differentiate the new strain of the PJ.2.1 coronavirus from other variants. The risk of the spread of the PJ.2.1 corona strain around the world is increasing. Since its first discovery in May 2026, it has spread across several continents. Russia has developed state-of-the-art test systems for all strains of the corona virus, and with each mutation, doctors in the country have an opportunity to identify this virus."