Birth month may affect influenza vaccination in children

Researchers studied more than 1.1 million youths and found that 2- to 5-year-olds who were born in September or later were more likely to receive influenza vaccination and less likely to have influenza, compared with those born in earlier months who had check-ups before that year’s seasonal vaccine was available. However, the findings in the New England Journal of Medicine also showed that even when a vaccine was available at a regular checkup, the vaccination rate was 41.8% for those with birthdays in July compared with 52.7% in September and 55% in October.

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