Although a majority of Americans are confident that childhood vaccines are highly effective against serious illness, Republicans’ trust in the effectiveness of childhood vaccines and support of school requirements is dropping, according to new polling from Pew Research Center.

Sixty-three percent of Americans are extremely or very confident in the effectiveness of childhood vaccines, according to a survey published Tuesday. But Democrats and those who lean Democrat are much more likely than Republicans and Republican-leaners to hold that view — 80 percent versus 48 percent.

And while the majority of Americans believe in the safety of vaccines — 53 percent believe childhood vaccines have been tested enough for safety and 51 percent agree that the childhood vaccine schedule is safe — there is significantly more uncertainty among Republicans. For Democrats, 74 percent show high confidence in the safety testing of vaccines and 71 percent believe the childhood vaccine schedule is safe. For Republicans, those numbers are 35 percent and 32 percent, respectively.

“Both things can be true, that people believe in vaccines’ effectiveness overall and the confidence is a little softer on safety,” said Eileen Yam, director of science and society research at Pew who was part of the primary research team. “But writ large, that’s been pretty stable to see confidence in vaccines. But at the same time, when it comes to things like school requirements, or ‘telling me what to do,’ or requiring me to do something — that’s where you see the bristling on the Republican side.”

Americans have become more skeptical of requiring that children get the measles-mumps-rubella (MMR) vaccine to attend public school. Sixty-nine percent support it, a decline from 82 percent in 2016. Most of the drop can be attributed to Republicans — with just 52 percent believing in the requirement, compared to 79 percent in 2016. For Democrats, that support was 83 percent in 2016 and actually climbed to 86 percent this year.

This all comes amid a major measles outbreak in the United States that started in Texas and has spread to multiple other states. And while students are required in each state to get the MMR vaccine to attend public school, officials in Florida have indicated a willingness to drop that requirement, showing a lack of confidence in the effectiveness of childhood vaccines.

Read the full article about Americans' confidence in childhood vaccines by Barbara Rodriguez at The 19th.