‘I am 30 and have no reason to get vaccinated.’ Getting COVID-19 shots in the arms of young adults a challenge for public health experts.

As public health officials race to vaccinate enough Americans to reach herd immunity against the coronavirus, getting shots in the arms of young adults might prove to be a major challenge, according to two recent studies by the CDC. In one study, nearly a quarter of 18- to 39-year-olds surveyed in the spring said they would “probably or definitely not” get vaccinated.