a campaign video sees dr vivek murthy and the sesame street favourite go through the process of getting vaccinated and explaining to children -lrb- and parents -rrb- why it is so important .
in what appears to be a direct response to anti-vaccination campaigners , elmo and dr murthy questions why everybody does not get a shot .
` why does everyone need a vaccination , anyway ? ' in response dr murthy compares getting vaccinated to using an umbrella when it rains and wearing a helmet on a bike that