Every country runs a routine childhood immunization schedule: a set of vaccines given at
recommended ages, usually starting at birth and continuing through adolescence. The schedules are
decided by national health authorities — the CDC in the United States, the national public health
institutes across Europe, and so on — and are aligned with the World Health Organization's global
recommendations. This generator reads the actual published schedule for your country and works out
where your baby is relative to it.
Each vaccine series has one or more doses, and each dose has a recommended age window. The window
matters: vaccines are timed to protect babies at the age when they are most vulnerable, and to
line up with the immune system's development. A dose is due now while today falls
inside its window, upcoming before the window opens, and overdue after the window closes without the dose being recorded.
Why does the schedule look different from one country to another? Some countries use a 6-in-1
combination shot where others use separate vaccines, some start rotavirus vaccination at 6 weeks
and others at 2 months, and booster timing varies from 12 to 18 months. The generator shows the
schedule for the country you select — which is exactly the schedule your pediatrician follows.
Two things worth knowing: a slightly late dose is almost always fine — public health guidance is
to catch up as soon as possible rather than restart a series — and combination vaccines mean one
shot often covers several diseases at once, which is why the number of injections is smaller than
the number of diseases prevented.