Most 4-year-olds receive four to six shots at their pre-kindergarten checkup, depending on whether certain vaccines are given as combination shots. These are booster doses of vaccines your child already started as a baby, not new ones. The visit often feels like a big deal because it’s the most shots at once since infancy.
The Standard Vaccines at Age 4
The CDC recommends the following vaccines for children between ages 4 and 6:
- DTaP (5th dose): protects against diphtheria, tetanus, and whooping cough
- IPV (4th dose): protects against polio
- MMR (2nd dose): protects against measles, mumps, and rubella
- Varicella (2nd dose): protects against chickenpox
That’s four separate injections at minimum. However, the MMR and varicella doses can be combined into a single shot called MMRV, which brings the total down to three injections. For children 4 and older, the combined MMRV shot is generally preferred over giving MMR and varicella separately.
Why These Are All Booster Doses
None of these vaccines are brand new to your child’s immune system. The DTaP shot at age 4 is the fifth dose in a series that started at 2 months old. The polio vaccine is the fourth dose. MMR and varicella are both second doses, following first doses given around 12 to 15 months.
These boosters exist because a single round of vaccination doesn’t always produce lasting protection. Two doses of the chickenpox vaccine, for example, provide about 92% effectiveness, and significantly fewer children experience breakthrough chickenpox compared to those who only received one dose. The second MMR dose works the same way, closing immunity gaps left after the first shot.
The Flu Shot and COVID-19 Vaccine
On top of those four core vaccines, your child is also due for an annual flu shot. If your 4-year-old has received at least two flu shots in previous years (spaced at least four weeks apart), they only need one dose this season. If they’ve never had a flu shot or their history is unknown, they’ll need two doses given at least four weeks apart.
The flu vaccine can be given as a shot or a nasal spray for children who prefer to skip a needle. Either version is an option starting at age 2.
COVID-19 vaccination for this age group is not a standard recommendation in the same way the other vaccines are. It falls under what the CDC calls “shared clinical decision-making,” meaning it’s offered based on a conversation between you and your child’s provider rather than routinely required. If your child has already started a COVID-19 series, one updated dose may be recommended.
Which Shots Schools Require
Every U.S. state requires certain vaccinations before a child can start kindergarten. The four vaccines required in nearly every state are DTaP, MMR, polio, and varicella. These overlap exactly with the shots given at the 4-year checkup, which is why pediatricians often call this the “kindergarten visit.”
Some states go further. Alaska, for instance, also requires hepatitis A and hepatitis B vaccines for kindergarten entry. Your pediatrician’s office will know your state’s specific list and can provide the immunization record your school needs. Most states also allow medical exemptions, and many permit religious or philosophical exemptions, though the rules vary widely.
Where the Shots Go
For children ages 3 through 6, the preferred injection site is the deltoid muscle in the upper arm. When multiple shots are given at the same visit, the provider may also use the thigh muscle, which has more mass in young children and makes it easier to space injections at least one inch apart. Your child will likely get shots in both arms, or a combination of arms and thighs, to spread things out.
What Side Effects to Expect
Soreness at the injection site is the most common reaction across all of these vaccines, and it’s practically universal. Your child may also have a low-grade fever, feel tired or fussy, or lose their appetite for a day or two. The DTaP shot in particular can cause soreness, swelling, fever, and fussiness. The MMR and varicella vaccines (or the combined MMRV) sometimes produce a mild rash or low fever about a week or two after the visit.
These side effects are short-lived, typically resolving within one to three days. A cool washcloth on the sore spot and age-appropriate pain relief can help your child through the worst of it.
How to Help Your Child Through the Visit
Four-year-olds are old enough to understand something is about to happen but too young to fully regulate their fear. Honest, simple preparation works better than surprises. Tell your child they’re getting shots, that it will pinch for a moment, and that it will be over quickly.
During the shots, hold your child on your lap facing you in a comforting embrace. Anchor their legs between your thighs so they can’t kick, and keep their arms steady. This position feels like a hug rather than a restraint, which makes a real difference in how frightened they feel. Distraction helps too: a favorite video on your phone, a small toy, or counting together can redirect their attention during the few seconds each injection takes.
If your child is especially anxious about needles, ask the office whether they can apply a numbing cream or patch to the injection sites before the shots. Some offices offer this routinely, while others will do it if you request it ahead of time.