Stratford News Influenza season quickly approaching SHARE ON: Casey Kenny, staff Friday, Nov. 1st, 2019 Free alzheimer's education session in Stratford. (Image supplied by PDHU). You’re being urged to get your flu shot. The Perth District Health Unit says influenza is expected to arrive soon in Perth County with the flu season typically running from November until April in Canada. Officials say the influenza vaccine is the best way people over 6 months of age can protect themselves and their families from getting sick with the influenza virus. You can visit the health unit’s website for details on where you can get your influenza shot.