New Subvariant Spreading in Northern Hemisphere During Flu Season
The World Health Organization has warned of the rapid spread of a new influenza virus subvariant in the Northern Hemisphere, confirming that vaccination remains the most effective means of preventing the disease and limiting its serious complications, especially during the winter season.
New Influenza Virus Strain Detected in Over 30 Countries
This year has seen the emergence and accelerated spread of a new influenza A(H3N2) subvariant, named J.2.4.1 or known as subvariant K.
This strain was first detected in Australia and New Zealand last August, before later being discovered in more than 30 countries worldwide, reflecting its rapid international spread.
No Indications of Increased Disease Severity Despite Genetic Mutation
Current data does not indicate an increase in the severity of illness associated with this new strain, even though the genetic mutation represents a notable evolution of the virus.
Influenza viruses are known for their constant evolution, which necessitates periodic updates to vaccine formulations to keep pace with genetic changes and ensure the highest levels of protection.
Current Vaccines Reduce Complications and Severe Cases
The new strain was not included in the formulation of the latest influenza vaccines for the Northern Hemisphere flu season. However, preliminary evidence suggests that currently available vaccines provide effective protection against severe cases and help reduce the risk of hospitalization and death.
Concerning Global Figures on Seasonal Influenza
It is estimated that the number of seasonal influenza infections reaches about one billion cases annually worldwide, including five million severe cases, with approximately 650,000 deaths recorded each year related to complications of the disease.
