This Flu Season Returns to Normal

The World Health Organization (WHO) Influenza Update N° 438 recently reported influenza activity decreased globally.

In the countries of North America, most indicators of influenza activity fell to levels similar to or below levels typically observed this time of year.

As of February 9, 2023, Influenza A(H3N2) was the predominant virus detected in the U.S., whereas A(H1N1)pdm09 and A(H3N2) were co-circulated in Canada in the most recent reporting week.

In Europe, overall influenza activity continued to decrease, but influenza positivity from sentinel sites remained above the epidemic threshold at the regional level. 

Separately, a leading mRNA-based flu shot candidate for adults announced encouraging interim results from its pivotal Phase 3 safety and immunogenicity trial of mRNA-1010 (P301).

As of February 4, 2023, the U.S. CDC confirmed about 172.76 million influenza vaccines had been distributed for the 2022-2023 flu season in the U.S.