FluMist, the nasal spray version of the influenza vaccine, is still being recommended for children in Canada, even though pediatricians in the U.S. have been told it's ineffective. The Public Health Agency of Canada says that for children without a medical reason that prevents them from receiving it, the influenza vaccine is recommended — either by nasal or needle. The U.S. has found that there was no convincing evidence that the nasal spray worked and that the jab did. "FluMist nasal spray remains recommended, but is no longer preferentially recommended for children 2-17 years of age," a PHAC spokeswoman said in an email. Flu vaccine makers try to keep up by switching up which strains to target each flu season.

Source: CBC News September 29, 2016 18:56 UTC