Why have the H1N1 flu vaccine dosing recommendations for children changed?
Since the end of the second wave of H1N1 flu virus in January 2010, Canada has seen very low levels of H1N1 influenza activity. Based on the current epidemiological data, children older than six months and under the age of three years and children between the ages of three and nine years with chronic health conditions who have already received a single half-dose of H1N1 flu vaccine do not require a second dose at this time.
