Measles Resurgence in the U.S.: A Cause for Concern

Decades after successfully eliminating measles, the United States is facing a resurgence of the virus. Experts warn that by late 2025, the country might lose its “measles elimination status” due to several outbreaks surfacing nationwide. Should that happen, it would join other nations like the U.K. and Canada, which have also experienced local measles outbreaks linked to declining vaccination rates.

An evaluation of the U.S. elimination status is set for November. In the interim, professionals in the field have issued a report assessing the situation. Live Science spoke with two authors from Boston Children’s Hospital — Dr. Anne Bischops, a pediatrician, and Maimuna Majumder, a prominent researcher — to discuss the current state of measles elimination in America and what the future might hold.

NL: We noticed an uptick in measles cases around January 2025. Did that raise your concerns about losing elimination status?

MM: My worries about elimination status go back much further than that. I’ve been involved with measles research for over a decade, and honestly, the rising cases were just a continuation of a long-standing issue.

When January rolled around, it felt like we were at a tipping point. It wasn’t our first indicator; the challenge of maintaining elimination status has always been precarious. When you start seeing small outbreaks expand into larger ones, that’s usually a sign things are getting out of control.

AB: The rise in vaccine-preventable diseases has been increasing for years. As someone who works in the ER, I’ve certainly seen more measles cases. The added complication of “vaccine fatigue,” especially post-COVID pandemic, plays a big role.

NL: What sets our current situation apart from earlier measles outbreaks?

MM: Reflecting on my experience during the Disneyland outbreak in 2015, it was a time when public sentiment about vaccines was more favorable. That incident led to significant legislative changes, making it harder for individuals to opt out of vaccinations. But now, the political landscape and public trust in health authorities have shifted profoundly.

With the pandemic and the spread of misinformation, public health messaging has become much more complicated. Back in 2015, there was a sense of hope; now, amidst the recent Texas outbreak, the opposite seems true. It feels like we’re losing control over our vaccination strategies.

NL: In your report, you mentioned that the U.S. has failed to meet four of seven criteria for maintaining elimination status. Why are these criteria useful?

AB: The Pan American Health Organization (PAHO) conducts meetings that require detailed data on measles transmission chains. Our identification of seven indicators serves as an early warning system leading up to these assessments. Basically, we’re trying to gauge the situation before a more thorough examination later this year.

NL: Do you believe some conditions might have been missed due to insufficient data?

AB: Yes, for instance, although we suspect certain genotypic data is lacking, we think it’s already the case. Similarly, we only have vaccination data for kindergartners, and that might not paint the full picture.

NL: There’s speculation that we are underreporting measles cases. What’s your take?

MM: I’d say that’s likely true. Since measles can present mildly, parents may not seek medical care, leading to underreporting. Our conventional methods require healthcare encounters, which may not always happen.

NL: Could wastewater surveillance help address this issue?

MM: The technology exists, but interpreting wastewater data effectively remains a challenge. It correlates with community outbreaks, but many factors complicate exact numbers.

NL: Going forward, will vaccination efforts primarily focus on local levels, given the federal government’s stance?

MM: Yes, typically vaccination campaigns are managed locally. The current federal stance even creates skepticism, affecting how individuals perceive vaccines at the state level.

Federal messaging shapes public sentiment significantly. Although states have the power to create their own vaccination requirements, public perception is heavily influenced by what’s discussed at the national level.

As a pediatrician, I notice that even a single negative comment about vaccines can overshadow numerous positive messages. Effective communication on health is vital; we need more efforts across all platforms.

NL: Any final thoughts from your progress report?

MM: This isn’t just an issue facing the U.S.; it’s a global problem. Many high-income countries are struggling with similar challenges, and their experiences can inform our strategies as well.

There’s a cultural context here. Young parents today might not understand the serious implications of measles. When public health works well, people often don’t realize its impact until faced with an outbreak.

NL: Judgment day for the U.S. elimination status is in November. How do you see it playing out?

MM: I would be genuinely surprised if we manage to reverse our situation. There’s a chance the criteria could shift so we don’t technically lose our status, but I wouldn’t be pleased with that outcome. Most likely, we won’t meet the established criteria.

AB: Ultimately, it’s up to the expert panel’s decision in November. Given the data, losing status seems inevitable.

NL: Could the panel adjust the benchmarks?

MM: That’s certainly a possibility. If they decide the criteria should be different, it could reflect a desire to avoid an image of failure.

However, it raises concerns about transparency and accountability. The interaction between federal agencies and organizations like the WHO adds another layer of complexity to this issue.

There are political ramifications at play. The U.S. can’t be treated like any other country. My hope is that facing such critical thresholds encourages more honest dialogue and proactive measures. Ultimately, the stakes are high, both domestically and globally.