There was an interesting overview yesterday in the dutch newsite nu.nl that listed the frequency for regular vaccinations for children: https://www.nu.nl/corona

There was an interesting overview yesterday in the dutch newsite nu.nl that listed the frequency for regular vaccinations for children: https://www.nu.nl/coronavaccins/6177160/weer-een-coronaprik-maar-drie-of-vijf-keer-een-vaccin-komt-vaak-voor.html https://www.nu.nl/coronavaccins/6177160/weer-een-coronaprik-... It's actually quite common that vaccinations need to be done multiple times (up to 5 times for DPT) and to have boosters for these when traveling to certain countries.