Always busy

Here is my 92 year old dad, working in the garden as every day, still using his old tools, no electric lawn mower in sight. He doesn’t believe the internet makes people happy and he doesn’t need it.
It makes it more difficult to keep in touch but we find other ways somehow.
He doesn’t want the vaccine as he thinks it should be given to younger people. Not sure how/whether I should persuade him to come down to the vaccination centre with me. Apart from being quite old he is also very stubborn.