De or het vaccinvaccinatie?

The correct Dutch article is:

de vaccinvaccinatie

Rule Words ending in -tie and -sie: almost always de. See the rule

This word is not in the word lists we use to double-check answers.

How to use vaccinvaccinatie

the vaccinvaccinatiede vaccinvaccinatie
this vaccinvaccinatiedeze vaccinvaccinatie
that vaccinvaccinatiedie vaccinvaccinatie
our vaccinvaccinatieonze vaccinvaccinatie
your vaccinvaccinatiejouw vaccinvaccinatie
every vaccinvaccinatieelke vaccinvaccinatie
which vaccinvaccinatie?welke vaccinvaccinatie?
a big vaccinvaccinatie / the big vaccinvaccinatieeen grote vaccinvaccinatie, de grote vaccinvaccinatie