Overview
- CDC reports about 15 million U.S. influenza cases with a 48% week-over-week jump in hospitalizations, more than 180,000 hospitalizations, and roughly 7,400 deaths, including 17 children.
- Mexico has confirmed 2,313 influenza cases and seven deaths this season, with authorities maintaining surveillance to spot atypical increases.
- In Mexico, A H1N1 accounts for 52.9% of confirmed cases, followed by A H3N2 at 33.6%, A not subtyped at 10.2%, and B at 3.3%.
- Health officials note regional variation in Mexico, with H1N1 predominating in central and southern areas and a greater H3N2 presence in parts of the north.
- Clinicians and CDC guidance highlight emergency symptoms requiring immediate care such as very high fever, rapid or difficult breathing, chest pain, blue lips, markedly reduced urine output, severe weakness, and they urge vaccination and basic precautions with estimated vaccine effectiveness near 40–50%.