Infants and young children are more susceptible to vaccine preventable diseases because their immune systems are not mature enough to fight all infections. Children who do not get vaccinated are at greater risk if they come in contact with vaccine preventable diseases. It’s important for children to be up-to-date with their vaccinations. Schools are places where infectious diseases are commonly spread. As a parent, you can keep your kids of all ages healthy with routine health care and vaccinations. Vaccines are the safest and most efficient way to guard against some diseases. Postponing vaccines can be harmful because it delays protection.