Washington: A flu jab appears to almost halve the heart attack risk in middle aged people with narrowed arteries, according to a new study.The researchers wanted to find out if flu is an unrecognised, but clinically important, contributing factor to increased heart attack risk.Scientists assessed 559 patients over the age of 40 who were referred to a tertiary hospital during consecutive winters in 2008-10. Some 275 of these patients had sustained a heart attack and 284 had not.Nose and throat swabs and blood samples taken at admission and 4-6 weeks later showed that around one in eight (12.4 percent; 34) of the heart attack patients had recently had flu, compared with just under 7 percent (18) in the comparison group. Half of all the patients had had the flu jab that year.
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