I'm confused. You can't make a law that says vaccines are mandated?
lol I think we are confusing each other. I probably misinterpreted what you wrote above. I'll write in detail about what I'm trying to say. Sorry if it sounds patronizing - not the intent at all.
It would be possible to mandate vaccines but there would need to be some form of punishment. E.g. kids not allowed at daycare. But the daycare scenario is complicated because there are both licensed and unlicensed daycares. Unlicensed daycares are still bound by some regulations but they're not inspected and the only way they ever come under scrutiny is when a kid gets hurt or something. Unlicensed daycares are usually when a family member is watching a child, or like the one my mom used to run with a few kids after school. Licensed daycares are bound by quite rigid requirements and are inspected usually pretty regularly. Generally, Licensed daycares are more expensive than unlicensed. The case of the woman in the OP article is unlicensed.
Mandating vaccines becomes problematic because there is no regulation that a child's daycare needs to be licensed at all, which is to say the daycare is not bound by all regulations. If legislation were passed requiring all kids that attend a daycare to be vaccinated, at best this would only ensure that all kids attending licensed daycares would be vaccinated because it would not apply to unlicensed. There's no way it could, since there is no requirement that a child even needs to attend a daycare at all much less a licensed one.
If a government run national day care system was in place, these would all be licensed facilities, and because the cost would be zero out of pocket (not counting tax increase) the number of kids at licensed facilities would go up. In turn, if legislation were introduced to require vaccines in order to attend the national day care system, more kids would get vaccinated. But a national day care system will never require that kids attend. Unlicensed centres will still exist and those kids still won't require vaccination (which is to say there is no legal requirement to be vaccinated. They still should be).
So the earliest opportunity to guarantee that all kids will be vaccinated is when they are first school aged, requiring vaccinations to attend school. I don't see how it could be enforced that children get vaccinated when they are 1 year old or w/e the most appropriate age is since there is nothing mandatory that this child will ever need to do at that age. Could fine the parents, I suppose, but it would probably be more expensive to keep track of than it would actually generate in revenue.
In my opinion, require kids at licensed centres to be vaccinated and then again require kids to be vaccinated at school age in order to attend school. Doesn't stop the homeschoolers, but... well... meh.