6 reasons to follow the schedule

Date last reviewed: 
Friday, Mar 03, 2023
A Brown mother holding her newborn baby and smiling.

1. Early protection

The immunization schedule protects your child early in life before they come in contact with vaccine-preventable diseases. Young babies are at high risk of getting sick and dying if they get one of these diseases. For example, pertussis (whooping cough) can be severe and even deadly for infants. That's why babies start getting the pertussis vaccine at two months of age.

An infant smiling with her arms above his head while sitting beside a smiling toddler.

2. Ideal timing

The schedule is designed to give your child protection at just the right time. When a vaccine is given is based on the following:
  • How your child’s immune system responds to vaccines at specific ages.
  • How likely your child is to come in contact with a particular disease and suffer complications from that disease at specific ages.
A smiling East Asian baby.

3. Every vaccine and dose matters

Each vaccine protects against a specific disease that could cause serious harm. Some vaccines require multiple doses to build strong enough immunity to protect your child or to boost immunity that decreases with time. Other vaccines need two doses because a child may not respond to the first dose.

Two grandparents holding toddlers and smiling while sitting on a couch.

4. Protecting others

Children who are not immunized on time are at risk of getting a vaccine-preventable disease and spreading it to others, including those most at-risk, like babies too young to get immunized and people who can't get vaccines for medical reasons. When you immunize your child on time, you don’t just protect them - you help protect your family, friends, and community, too.

A white woman sitting on a couch with a baby on her lap and an infant beside her holding an ipad.

5. Not following the schedule is risky

Delaying, skipping, or spacing out vaccines leaves children at risk of getting diseases at an age at which they are most likely to have serious complications. Spacing out vaccines also means more clinic visits and periods of discomfort for your child, which may increase your child’s risk of developing needle fears. 

Article: The Problem with Dr. Bob’s Alternative Vaccine Schedule (Pediatrics, 2009)

A Black woman smiling while holding a smiling toddler on her back.

6. Maternal antibodies wear off

Newborn infants get immunity to some vaccine-preventable diseases when maternal antibodies cross the placenta. However, this protection depends on what the mother is immune to and is temporary. Breastfeeding provides important protection against some diseases, but breastfeeding alone does not provide protection against vaccine-preventable diseases. Your child won’t get enough protection from maternal antibodies and breastfeeding, so following the schedule is essential for the best and long-term protection.