Betting on Measles: US Prediction Markets Target Public Health Crises

Billboards appearing near schools in Brooklyn, New York, initially look like standard public health messages promoting vaccination. However, a closer look reveals the logo of Polymarket, an online prediction market inviting users to wager on whether states will end vaccine mandates. This trend marks a significant shift in the gambling landscape, turning public health crises into speculative commodities. Alongside Polymarket, the platform Kalshi has also expanded its offerings, allowing bets on the number of measles cases in the US in 2026 and the timing of FDA skin cancer vaccine approvals.

These platforms operate in a regulatory gray area. By positioning their wagers as financial derivatives rather than traditional bets, they fall under the jurisdiction of the Commodity Futures Trading Commission (CFTC) rather than state gambling boards. Lia Nower, a professor at Rutgers University, describes the current state as the "wild, wild west," noting the absence of a federal body to prescribe limits or minimum guidelines. The lack of oversight raises concerns that lawmakers or officials could place bets on policy outcomes they have the power to influence.

Numbers and facts

The impact of online gambling on public health is increasingly documented. A new report co-authored by Lia Nower shows that more than half of young people aged 13 to 27 gambled in the past year. Within this group, 39.5% exhibited some level of gambling-related risk, while 10.3% were classified as high-risk for problem gambling. Matthew Eisenberg of the Johns Hopkins Bloomberg School of Public Health notes that the legalization of sports betting has been followed by measurable increases in treatments for depression and anxiety among young men.

Furthermore, there is a distinct risk of clinical trial manipulation. If significant sums are wagered on the success of a drug, trial participants might alter their behavior to influence the outcome. While Kalshi spokesperson Dani Lever argues that these markets improve transparency by bringing scattered insights to the public, critics remain skeptical. Matthew Eisenberg highlights a specific danger:

"The risk isn't necessarily that a reviewer takes a bribe – it's that the market now rewards leaks." - Matthew Eisenberg, Professor at Johns Hopkins Bloomberg School of Public Health

Background

By classifying wagers as "event contracts," these platforms often bypass the taxes and consumer protection funds that regulated casinos must support. Very little revenue from these markets flows back to states for gambling addiction treatment. Some states, such as New Jersey, are moving to restrict these markets due to concerns over consumer protection and insider trading. Experts fear a future where gambling is integrated into every aspect of life with fewer and fewer safeguards for the vulnerable.

Why it matters for German players

For players in Germany, the situation is starkly different due to the State Treaty on Gambling 2021 (GlüStV 2021). Platforms like Polymarket or Kalshi do not hold a German license from the Joint Gambling Authority of the States (GGL). Consequently, participating in such health-related bets from Germany is illegal and lacks any legal protection. German players are advised to stick to the GGL whitelist. Germany enforces strict limits, including a 1,000 Euro monthly deposit limit monitored via the LUGAS system and a 1 Euro per spin limit on virtual slots.

These eccentric betting markets on disease outbreaks contradict German goals of addiction prevention and the protection of public integrity. While the US faces a regulatory vacuum, the German licensing model ensures that only offerings with verified safety standards and connection to the OASIS player blocking system are permitted.

What it means for GGL-licensed casinos

GGL-licensed casinos must distance themselves from such international trends to maintain their reputation for integrity. German advertising regulations already prohibit bets that violate public decency or exploit social issues. The developments in the US underscore the importance of proactive regulation to curb the black market. GGL-licensed providers can position themselves as a safe alternative to unregulated crypto-betting platforms by prioritizing transparency and strict adherence to player protection laws.