With DD being 750 miles away, and DS being almost 3,000 miles away, the best I can do is tell them they should do it. And in DS's case, he will have to wait until after his birthday in just over a month (he is just shy of 18, so would need my consent). Hopefully they will. DD, who hates needles, has been somewhat good about it. DS doesn't mind needles at all. But he doesn't do much of anything without a nudge. I will get mine, though.