No Resurgence — Yet — in Cities Hardest Hit by H1N1 Last Spring
Some cities are reporting near-normal levels of flu activity for this time of year, according to an article in Thursday’s New York Times. The cities were those hardest hit at the outset of the 2009 H1N1 flu pandemic.
New York, which had widespread school closures in the spring, is reporting normal attendance, according to the Times. The same holds true for Boston and Philadelphia. One theory to explain the relative lack of flu in these cities — as opposed to the rest of the country where activity is widespread — is that the earlier outbreaks conferred enough “herd immunity” to protect them now. The theory was put forward by New York City’s health commissioner at a national flu meeting last week.
Others aren’t so sure. The Times quotes one CDC researcher who says it’s “an interesting hypothesis, with biological plausibility,” but that only time would tell whether it’s accurate.