Toddler Checkups and Vaccines: What to Expect at 1 to 3 Years

In one minute

• Well-child visits typically land at 24 months, 30 months, and 3 years, and combine growth measurements, a developmental screening questionnaire, and scheduled vaccines.
• Developmental screening (often a questionnaire called the ASQ-3) is just a set of questions you answer about your toddler at home — it's not a test performed on your child, and it takes about 10–15 minutes.
• Fevers in toddlers are almost always viral and short-lived; most don't need antibiotics and aren't dangerous by themselves — though a few specific signs below are worth calling about.
• Delaying or spacing out vaccines doesn't reduce side effects — it just leaves your toddler unprotected for longer.

What actually happens at the checkup

Between 1 and 3, checkups happen less often than in the first year, but they cover more ground. Expect your toddler's height, weight, and head circumference plotted on a growth chart, a look at teeth and hearing/vision, and a developmental screening questionnaire at 24 or 30 months — usually a short parent-completed form asking about words your toddler says, whether they point to share interest, how they climb or run. It's designed to catch things early, not to alarm you: most toddlers screen as on track, and if something needs a closer look, catching it now is what makes early intervention effective.

Vaccines are also part of these visits — the standard schedule plus an annual flu shot from 6 months on, and updated COVID-19 guidance depending on your toddler's risk factors. If you're unsure why a particular vaccine is timed the way it is, it's worth asking — the spacing is chosen to build protection as early as safely possible, not on a schedule that can be shuffled around without a real tradeoff.

Fevers and when they're more than "just a bug"

A fever on its own — even a high one — isn't usually a red flag. It's a sign the immune system is working, and most toddler fevers come from ordinary viruses that resolve on their own within a few days. What matters more than the number on the thermometer is how your toddler acts: are they still drinking, still interactive between fever spikes, still themselves once the fever comes down with medicine? Never give aspirin to a child with a fever — ask your pediatrician which fever reducer and dose is right for your toddler's weight.

When to call your pediatrician: your toddler isn't drinking, isn't acting like themselves between fever spikes, or doesn't perk up once the fever comes down — regardless of the exact number. Also call for a fever of 102.2°F or higher in a child under 3, a fever lasting more than 5 days, no tears when crying or noticeably fewer wet diapers, or a rash that doesn't fade when you press on it. Call 911 or go to the ER for a stiff neck with fever, breathing that looks labored or fast, blue-tinged lips, a seizure, or a toddler who's unusually hard to wake.

Sources

1. American Academy of Pediatrics (2024–2025). Recommended childhood immunization schedule. https://publications.aap.org/pediatrics/article/153/2/e2023065044/195490/Recommended-Childhood-and-Adolescent-Immunization
2. Centers for Disease Control and Prevention (2024). Developmental milestones and screening tools. https://www.cdc.gov/act-early/milestones/index.html
3. NHS Healthier Together (2024). Child health checks and milestones. https://www.healthiertogether.nhs.uk/child-under-5-years/important-milestones
4. Jung, M. et al. (2025). ASQ-3 developmental screening outcomes in England. https://pmc.ncbi.nlm.nih.gov/articles/PMC11934300/