Americans’ confidence in the safety of vaccines for measles, mumps and rubella has declined in recent years as the United States faces its largest measles outbreak in decades, according to a new Reuters/Ipsos poll. The survey found 76% of Americans consider the vaccines safe for children, down from 84% in a May 2020 Reuters/Ipsos poll.

The decline comes as measles cases have climbed sharply across the country. The CDC reported 3,294 confirmed cases through Sept. 10, 2026, with 95% associated with outbreaks. The agency also reported that MMR vaccination coverage among kindergartners fell to 92.4% during the 2025-26 school year, below the 95% level generally associated with community immunity.

The poll found that a bipartisan majority of Americans still support vaccinating children against measles, despite the decline in confidence. Two doses of the MMR vaccine are about 97% effective at preventing measles, according to the CDC, which recommends two doses for children.

The survey also found that only 19% of respondents approved of President Donald Trump’s handling of the measles outbreak, while 52% disapproved. Trump signed an executive order in August directing federal health officials to review the childhood vaccination schedule, while Health Secretary Robert F. Kennedy Jr. has pursued changes to federal vaccine policy.

The Reuters/Ipsos poll surveyed 1,143 U.S. adults nationwide and carried a margin of error of three percentage points. The results come as health officials monitor continued outbreaks and the country faces questions about whether it will retain its measles elimination status after sustained transmission.