Most parents see their children grow into adults and move on, you see them fly the nest and mourn the loss of routine and company, for about 5 minutes.
Unless the child is handicapped for life and needs full time care until the parents pass way and the grown offspring goes into a care home, Sue Ryder is one provider.
Most of those in such places arrive in their 50s made disabled by the high temperature they suffered from contracting measles in infancy, parents have passed away or through age can no longer cope. Measles is recoverable but many are left blind, or deaf or physically disabled or all of that but with normal brain function and life expectancy.
I was lucky. When as a small child I had measles a GP was visiting and had me placed in an ice bath to break the fever that would have damaged me. All I have to show for it now is multiple sclerosis.
So I made sure my own children had every vaccine going - no parent wants to risk spending their whole life parenting a dependent adult.