While many physicians in the United States report frustrations with their work, the public continues to hold health care providers in high regard.
Still, white evangelical Protestants and religious "nones" are somewhat less likely than members of other religious groups to support a vaccine requirement.
Parents with children ages 4 or younger are more concerned than other Americans about the potential risk of side effects from the MMR vaccine.
While most Americans support requiring childhood vaccinations for measles, mumps and rubella, parents of young children rate the risks of the vaccine higher and the benefits lower.
Some groups still have concerns, however, according to a new study from the Pew Research Center