Flu vaccinations are available at all samedaydoctor clinics during flu season from October to February. Appointments are available on the same day or walk-in where you see the symbol . Anyone can request a flu vaccine, but they are particularly recommended to those with health conditions that make flu more dangerous e.g. pregnant women and children. Vaccines contain the 3 or more strains of flu virus that are predicted to be the most likely to cause a flu epidemic in a given year.