Timing of routine immunisations and subsequent hay fever risk.


BACKGROUND Suggestions that immunisation influences allergic disease risk, either positively (pertussis) or negatively (BCG) are of concern for vaccination policy. AIMS To determine whether DTP, MMR, and BCG vaccination in infancy influenced hay fever risk. METHODS Case-control study of 7098 hay fever cases and controls, within two primary care… (More)


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