Sydney: Ineffective vaccines may be behind the resurgence of whooping cough in babies, characterised by flu-like symptoms such as a blocked or runny nose, sneezing, mild fever and mild cough, says a study.A joint study by the Queensland Children`s Medical Research Institute (QCMRI) and the Royal Children`s Hospital found that children given the current vaccine against whooping cough were three times more likely to develop the highly contagious respiratory infection than children who received an earlier version of the vaccine.
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