Wildly misleading statement, especially given the tiny sample size versus hundreds of millions of adults in the US.

From that same link (demonstrating Americans are overwhelmingly in favor of vaccines; which is obvious given the high vaccination rates in the US):

"While the vast majority (82%) chose in favor of vaccines, 8% selected responses expressing serious doubt. An additional 9% said they were unsure."

Also:

"In a survey of 1,025 randomly sampled adults, 84% of respondents said they believed that it is extremely or very important that parents vaccinate their children"

"Additionally, 86% believed vaccines are not more dangerous than the diseases they prevent, whereas 89% said they are aware of the advantages and disadvantages of vaccines."

https://www.healio.com/news/pediatrics/20200116/faith-in-vac...

None of this disagrees with the link I posted. In fact your own link quotes different research saying:

The poll showed that only 45% of Americans believe vaccines do not cause autism in children.

And as the link noted, measles needs a 95% vaccination rate to be stopped effectively.