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Intranasal live attenuated influenza vaccine has been more immunogenic than intramuscular inactivated vaccine among children in clinical trials. This finding has led to the assumption that the live vaccine also should be a more powerful inducer of herd immunity. Canadian researchers studied the community-wide performance of both vaccines in 52 rural Hutterite colonies — tiny religious settlements composed of single-family homes and communal cooking, dining, and meeting facilities. During three influenza seasons (2012–2015), 1186 children (age range, 3–15) were randomized by colony to receive either intranasal live attenuated flu vaccine or inactivated flu vaccine in a double-blind fashion. Influenza and respiratory illness rates were tracke…