The US is dealing with a common illness, measles, which was once assumed to be gone as a public health threat but has come back in numbers not seen in more than 30 years. At the same time, new national poll statistics indicate that public trust in the measles, mumps, and rubella (MMR) vaccine is still strong, although it is starting to fade. These things happening at the same time point to a bigger problem for public health systems that depend on trust, prevention, and getting people involved in their communities. 

SSRS, an independent market research company, conducted a nationally representative panel survey of 1,637 US adults for the Annenberg Public Policy Centre. The study was conducted between November 17 and December 1, 2025. The margin of sampling error for the overall sample is ±3.5 percentage points at the 95% confidence level. 

The US Centers for Disease Control and Prevention (CDC) has confirmed approximately 2,000 cases of measles nationwide this year. The illnesses have spread through 49 different outbreaks across 44 states, with big clusters recorded in Texas, along the Utah-Arizona border, and, most recently, in South Carolina. Three deaths have been reported, including two youngsters. These figures indicate the largest national burden of measles since the early 1990s. 

Measles is one of the most highly contagious infectious illnesses known. It spreads through coughing, sneezing, and even shared air in enclosed places, and an infected individual can be infectious for hours after leaving a room. Though mostly associated with a childhood rash and fever, measles can also cause pneumonia, brain inflammation, and death, especially in young children and those with compromised immune systems. 

In 2000, the United States declared that measles had been "eliminated", which meant that it was no longer spreading within the country. The elimination of measles does not signify its complete eradication; it merely signifies the limitation and control of outbreaks. That status is now in danger. The CDC says that 93% of reported cases this year were in people who had not been vaccinated or whose vaccination status was uncertain. This statistic shows how important it is to get vaccinated to stop the spread of the disease. 

The study shows that people's views on vaccination are changing in little but meaningful ways. The proportion of people in the US who would recommend the MMR vaccine to a family member who is eligible has gone down from 90% in November 2024 to 86% during the survey. The drop reflects a change in confidence that public health authorities are closely watching.

Other routine immunisations showed similar decreases. The willingness to suggest the human papillomavirus (HPV) vaccine fell from 79% to 75%, while support for the polio vaccine dropped from 88% to 85%. In contrast, sentiments about vaccines like shingles and Tdap, which protects against tetanus, diphtheria, and whooping cough, have remained stable. 

People's perception about the MMR vaccine's safety and efficacy dropped substantially post-2022, the report noted. While the trust in safety saw a 5 percentage point drop from 88% to 83%, that regarding efficacy dropped by four percentage points from 87% to 83%. The study's authors say that these losses are fewer than those seen with flu and Covid-19 vaccines. The decrease suggests that people still have a lot of faith in the MMR vaccine. But they say that even "small but significant decreases" need to be handled carefully.

One of the harder things to figure out is how people see risk. Even if the current outbreak is big, the number of adults who are worried about getting measles has gone down from 17% in April 2025 to 13% presently. This decline is different from the rise in worry over Covid-19 throughout the same time period. The authors of the study say that the decline is a surprising trend because measles cases are going up. 

More Americans are also learning that measles is a serious disease. The percentage of adults who believe getting measles is "bad" for them has increased from 58% in 2022 to 68% now. This difference shows that people are less worried about personal harm yet more aware of damage, highlighting a gap between awareness and perceived urgency. Behavioural researchers have long noted that individuals might acknowledge a health concern without perceiving a personal risk, particularly when epidemics are geographically distant or unfamiliar.

The survey results show that the current rise in measles cases should be seen as an early warning, not just a one-time event. People must continue to receive vaccinations and maintain trust in the government to prevent disease. If left unchecked, minor disruptions could significantly impact an integrated and mobile society.