In life, timing can be very important. Each of us should get vaccination against the flu. Reminders can be seen year round. Timing of the vaccination is important because the effectiveness begins to diminish after six months. Outbreaks can occur from December to May. Since the peak season for infections starts in December becoming worst usually during the Christmas-New-Year’s holidays and maximum immunity takes a month to 6 weeks to achieve, the last half of October is the best time to be vaccinated.