• 02 Jul, 2025

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France is grappling with a new strain of influenza: are vaccines ineffective?

A new influenza strain is causing major problems in France's pig farms. It appears that the pathogen is able to evade established vaccines.

A new influenza strain is causing major problems in France's pig farms. It seems that the virus can bypass established vaccines.

In France, the new influenza strain H1N2#E is spreading more and more. The number of documented outbreaks has increased from an average of 400 per year to over 660.

The new influenza strain causes severe respiratory problems, fever, and abortions. Researchers have found that this new strain genetically differs from previous influenza strains and can bypass immunity in pigs from past infections or vaccinations.

Believed to have been introduced from Denmark, the influenza variant first appeared in Brittany in 2020 and quickly spread throughout the country. Due to the limited effectiveness of vaccines, researchers recommend enhancing biosecurity measures.