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Influenza virus is infectious for days on banknotes

Influenza virus may be transmitted among humans in three ways: by direct contact with infected individuals; by contact with contaminated objects (called fomites, such as toys, doorknobs); and by inhalation of virus-laden aerosols. The contribution of each mode to overall transmission of influenza is not known. But something that most of us touch on a …

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Being older is a good defense against 2009 H1N1 influenza virus

Why is the incidence of infection with 2009 H1N1 influenza highest among 5-24 year olds, and lowest in those over 65 years of age? Were the oldsters previously infected with a related influenza virus, or is there another explanation? The sera of individuals born in the early part of the 20th century have antibodies that …

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Do women need the same amount of influenza vaccine as men?

“Do Women Need Such Big Flu Shots?” suggests that we would have more doses of influenza 2009 H1N1 vaccine if we accounted for the biological differences between men and women. The idea is that women generate a stronger antibody response than men, and therefore require less vaccine. Does this idea have scientific support? The opinion …

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