Actually, this looks more like an effort to boost the pres' image to a public that doubts.
Its a common procedure for morale boost. In times of trouble, leadership does things to make the people endear to the leader.
Not a new trick either, its been used for thousands of years.
That he gets merit for doing it? Sure, why not. I mean, heck, with the odds of 1 in a million of getting screwed by the vaccine, he may as well buy the lotto while at it.
Now if they could only vaccinate him against pretzels...
