The World Health Organisation (WHO) has warned of the rapid spread of a new influenza strain in the Northern Hemisphere, emphasising that vaccination remains the most effective form of protection.

Dr. Wenqing Zhang, Head of the Global Respiratory Threats Unit at WHO, explained that this year has seen the emergence and rapid spread of a new influenza subtype (AH3N2), named J.2.4.1 or subclade K. It was first detected in Australia and New Zealand last August and has since been identified in more than 30 countries.

She confirmed that current data do not indicate an increase in disease severity, although the genetic shift represents a notable evolution of the virus. Zhang noted that influenza viruses are constantly evolving, which necessitates regular updates to the vaccine composition.