Is it safe for my baby to have several vaccines at once?

Published 9 October 2026 · Child Vaccine Tracker · How we check

Many parents feel uneasy when they see that their baby will have two or three injections, and sometimes oral drops as well, at one appointment. It is a very natural worry. The short answer is that giving several vaccines at the same visit has been studied closely for decades and is safe - and it protects your baby sooner.

A baby's immune system is busier than you might think

From the moment they are born, babies meet an enormous number of new germs every day - on skin, in milk, on toys, in the air. Their immune systems respond to all of them. The vaccines on the childhood schedule add only a small number of carefully chosen targets to that. Modern vaccines are also far more refined than older ones, so today's whole schedule contains fewer of these targets (antigens) than the schedules many parents had as children, even though it protects against more diseases.

Vaccines are tested together

Before a vaccine is added to a schedule, it is tested alongside the other vaccines given at the same age, to check that each one still works as well and that side effects are not increased in a worrying way. Health authorities such as the US CDC state that getting several vaccines at the same time has been shown to be safe and that the vaccines work as well together as they do on their own.

Why not spread them out?

Protection comes sooner. The diseases in the first-year schedule - whooping cough, Hib, pneumococcus, meningococcus - are most dangerous to the youngest babies. Delaying some vaccines leaves a gap when your baby is unprotected.
Fewer appointments and fewer upsetting moments. Spreading vaccines out means more visits, and each visit can be stressful for you and your baby.
Combination vaccines already reduce the needles. A single 6-in-1 injection, for example, protects against six diseases.

What to expect afterwards

Your baby may be a bit sore, unsettled or sleepy for a day or two, and a mild fever is common. Some combinations are more likely to cause a fever - for example when the MenB vaccine is given with other baby vaccines, which is why some countries advise infant paracetamol after those visits. Read our guide to what is normal and what is not.

Making the visit easier

The injections are usually given in different limbs, a few seconds each. Feeding your baby during or straight after, and holding them close, are the most effective comforts. Our article on what to expect at the first vaccinations walks through the whole appointment.

If you are still worried, talk it through with the nurse or doctor before the injections - they are used to these questions and will not mind.

Sources

Reminder: this article is general information, not medical advice. For your own child, speak to your GP, health visitor, practice nurse or paediatrician, and book vaccinations through your local service.