Get a personalized schedule for your child's vaccines and find links to information about the benefits and potential risks of immunizing children. Find out if your child's vaccinations are up to date. Check the schedule for the age or age range when each vaccine or series of shots is. Vaccination is the best way to protect your child against many dangerous diseases. In Canada, vaccines prevent illnesses such as diphtheria, tetanus, pertussis. Myths and facts Vaccines: Many people consider them the most important part of well-child checkups. We're sorry, an error occurred. Two or three doses are given, depending on age and the volume of vaccine used. See also Immunizations and Developmental Milestones [2 pages].