H1N1 flu activity in the United States has declined since peaking the week ending Oct. 24, federal health officials say.
The Centers for Disease Control and Prevention's Morbidity and Mortality Weekly Report released Thursday says rates of influenza-related hospitalizations and deaths among those younger than age 65 have been substantially higher this season than in recent influenza seasons.
As of Jan. 9, the majority of influenza activity this season has been due to H1N1 flu.
In January and February, influenza activity usually increases; thus, cases of H1N1 flu, seasonal flu, or both, might go up the remainder of the season, the report says.
H1N1 vaccine availability has increased to more than 130 million doses, and most jurisdictions are encouraging vaccination H1N1 vaccination for all people older than 6 months, health officials say.
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