English is wrong or unnatural (& can't be reported). "Kids' vaccinations."
Yeah. It could also be "children's vaccinations" or "vaccinations for kids/children"
A "kid" is a baby goat, would appreciate the use of "children".
Where in the English-speaking world is “kids” not an extremely common synonym for “children”?
It is colloquial/slang
Childrens' immunisations - this should definitely be accepted