You've just received an appointment reminder for your baby's first vaccination. Maybe you feel a little knot in your stomach. What will your baby receive? Will it hurt? Is it safe?
The childhood immunization program is among the most comprehensive in the world. The CDC and WHO continually monitor vaccination programs to ensure that the vaccines offered are safe and effective. Over 95% of parents choose to vaccinate their children.
Here you'll find a complete overview of all vaccines in the program, what they protect against, common side effects, and practical tips for vaccination day.
The Childhood Immunization Program
The childhood immunization program offers free vaccines to all children. The first vaccine is given at the pediatrician's office as early as 6 weeks of age.
The program has a long history. Vaccination programs have been in place since the 1950s. Since then, vaccines have eradicated or dramatically reduced serious childhood diseases such as polio, diphtheria, and measles.
The CDC and AAP (American Academy of Pediatrics) oversee vaccine recommendations. They continuously evaluate which vaccines to include, based on new research, disease trends, and international recommendations from WHO.
Vaccination is recommended by health authorities and is typically covered by insurance or provided free through public health programs. Check with your pediatrician or local health department for specifics in your area.
The Vaccine Schedule: All Vaccines by Age
Here is an overview of all the vaccines your child will be offered:
6 weeks (first vaccination)
- Rotavirus vaccine - given as drops in the mouth (not an injection) - protects against rotavirus gastroenteritis (dose 1)
2 months
- Rotavirus vaccine - dose 2
- DTaP-IPV-Hib-HepB combination vaccine - dose 1 - protects against diphtheria, tetanus (lockjaw), whooping cough, polio, Hib infection, and hepatitis B
- Pneumococcal vaccine (PCV13) - dose 1 - protects against serious pneumococcal infections such as meningitis and pneumonia
4 months
- DTaP-IPV-Hib-HepB combination vaccine - dose 2
- Pneumococcal vaccine - dose 2
- Rotavirus vaccine - dose 3 (some formulations)
6 months
- DTaP-IPV-Hib-HepB combination vaccine - dose 3
- Pneumococcal vaccine - dose 3
12–15 months
- DTaP combination vaccine - booster dose
- Pneumococcal vaccine - booster dose
- MMR vaccine - dose 1 - protects against measles, mumps, and rubella
- Varicella vaccine - dose 1 - protects against chickenpox
4–6 years
- DTaP-IPV booster dose - diphtheria, tetanus, whooping cough, and polio
- MMR vaccine - dose 2
- Varicella vaccine - dose 2
11–12 years
- HPV vaccine - given to both boys and girls - protects against HPV-related cancers (2 doses)
- Tdap booster - tetanus, diphtheria, and whooping cough
Your child receives several vaccines at each visit. That sounds like a lot, but the body handles this well. The immune system encounters thousands of foreign substances daily — a few extra antigens from vaccines pose no burden.
What Do the Vaccines Protect Against?
Let's take a closer look at the diseases the vaccines prevent:
Diphtheria - a serious bacterial infection that attacks the airways. Can lead to suffocation. Rare in countries with vaccination programs.
Tetanus (lockjaw) - bacteria found in soil that can enter through wounds. Causes life-threatening muscle spasms.
Whooping cough (pertussis) - a prolonged, severe cough that is especially dangerous for infants under 6 months. Can cause breathing to stop in the youngest babies.
Polio - a viral infection that can cause permanent paralysis. Eradicated in many countries thanks to vaccination.
Hib infection - can cause meningitis and epiglottitis in young children.
Pneumococcal infection - the most common cause of bacterial meningitis and ear infections in young children.
Rotavirus - the most common cause of severe gastrointestinal infection in young children. Causes severe vomiting and diarrhea that can lead to dehydration.
Measles - an extremely contagious virus that can cause serious complications such as pneumonia and brain inflammation.
Mumps - a viral infection that can cause inflammation of the testicles (risk of infertility) and meningitis.
Rubella (German measles) - a mild illness in children, but very dangerous for pregnant women. Can cause serious birth defects.
Hepatitis B - a viral infection that attacks the liver. Can cause chronic infection and liver damage.
HPV - human papillomavirus that can cause cervical cancer, anal cancer, and cancer of the mouth and throat.
Side Effects of Vaccines
Like all medicines, vaccines can cause side effects. The vast majority are mild and temporary.
Common Side Effects
- Pain at the injection site - redness, swelling, and tenderness where the injection was given. This is the most common side effect and resolves within 1–3 days.
- Mild fever - a temperature up to 101.3°F (38.5°C) is normal for 1–2 days after vaccination.
- Fussiness - your baby may be more irritable than usual for the first day.
- Drowsiness - some babies sleep more than usual after vaccination.
After the Rotavirus Vaccine
Some babies experience loose stools or stomach discomfort for a few days. This resolves on its own.
Rare Side Effects
Serious side effects are very rare. The risk of a severe allergic reaction (anaphylaxis) is approximately 1 per million doses. That's why your baby should always wait at the pediatrician's office for at least 20 minutes after vaccination.
Health authorities monitor all reported side effects through dedicated tracking systems. Healthcare providers are required to report suspected serious side effects. This monitoring means that even very rare side effects are detected quickly.
When Should You Contact a Doctor After Vaccination?
- Fever above 104°F (40°C)
- Your baby is unusually limp or unresponsive
- Significant swelling or redness spreading from the injection site
- Your baby cries loudly and inconsolably for more than 3 hours
- You are concerned for any other reason
Read more about fever in children for general advice on managing fever.
Preparing Your Baby for Vaccines
A few simple steps make vaccination day easier for both you and your baby.
Before Vaccination
- Plan the timing - schedule the appointment when your baby is rested and fed, not just before naptime
- Bring a favorite toy or pacifier - something familiar and comforting to hold
- Dress your baby practically - clothes that are easy to remove and put on from the thigh (most vaccines are given in the thigh for infants)
During Vaccination
- Hold your baby close - physical contact provides reassurance and reduces the pain response
- Breastfeed or offer a bottle - nursing or sucking during the injection is the most effective pain relief for infants
- Stay calm yourself - babies pick up on parents' stress. Speak calmly and reassuringly
After Vaccination
- Stay at the office for 20 minutes - this is routine to catch any possible allergic reactions
- Acetaminophen if needed - you can give acetaminophen if your baby has pain or fever above 101.3°F (38.5°C). Follow the dosing instructions for your baby's weight.
- Extra comfort - your baby will likely need a little extra soothing for the rest of the day
Many parents find that the stress of vaccination is worse for them than for their baby. Infants forget the injection quickly. A brief cry followed by some comforting, and most babies are content again within a short time.
Vaccination of Premature Babies
Premature babies follow the same vaccination schedule as full-term babies. Vaccines are given according to chronological age (age from birth), not corrected age.
This means a baby born at 32 weeks receives their first vaccine 2 months after birth, just like other babies.
Premature babies have a more immature immune system and are therefore especially vulnerable to infections. Vaccination is particularly important for this group. Talk to your baby's doctor if you have questions about the timing of vaccines.
New Vaccines in the Program
The childhood immunization schedule is updated regularly. In recent years, several new vaccines have been added:
- Rotavirus vaccine - protects against the most common cause of severe gastrointestinal illness in young children. Given as drops in the mouth at 6 weeks and 2 months (2–3 doses depending on formulation).
- HPV vaccine for boys - previously only for girls, the HPV vaccine is now recommended for all children regardless of gender starting around age 11–12.
- Hepatitis B - included in the combination vaccine given from 2 months of age.
- Whooping cough vaccine for pregnant women - pregnant women are offered a Tdap vaccine during weeks 27–36 of pregnancy to protect the newborn.
Meningococcal vaccines (ACWY and B) may be recommended depending on your region's guidelines and your child's risk factors. Chickenpox (varicella) vaccine is included in the standard schedule in many countries. Ask your pediatrician about the current recommendations in your area.
These changes show that the program is in constant development, based on updated knowledge and disease trends.
Frequently Asked Questions
Can I delay vaccines?
Vaccination is recommended starting at 6–8 weeks of age. Delaying means your baby is unprotected longer. Some diseases, like whooping cough, are especially dangerous for the youngest infants. Talk to your pediatrician if you're considering waiting.
What if my child has missed a vaccine?
It's never too late to catch up. Your pediatrician will create an individual plan to get back on track. You don't need to start over — all doses already given count.
Is it safe to give multiple vaccines at the same time?
Yes. Studies show that giving multiple vaccines simultaneously is just as safe as giving them separately. Your baby's immune system is designed to handle many hundreds of antigens at the same time. The few antigens in vaccines represent a minimal challenge by comparison.
Can vaccines cause autism?
No. This myth stems from a study published in 1998 by Andrew Wakefield. The study was later retracted due to fraud, and Wakefield lost his medical license. Since then, many large studies — including a Danish study with over 650,000 children — have confirmed that there is no connection between the MMR vaccine and autism.
Can my baby be vaccinated if they have a cold?
Yes, with a mild cold and no fever, your baby can be vaccinated as usual. If your baby has a high fever or is clearly ill, vaccination should be postponed until your baby has recovered.
What about children with allergies?
Most children with allergies can be vaccinated normally. Inform your healthcare provider about any known allergies so they can take necessary precautions. Children with known severe allergies to vaccine ingredients should be evaluated individually by a doctor.
Want to keep track of your baby's vaccines? Log vaccines in the health tracker to have everything in one place. Read more about health and development for newborns, or check the newborn essentials checklist.
Read also: Vaccine reactions in babies | Well-baby visits | Your baby's immune system