Unsafe food is a global health crisis, responsible for approximately 866 million illnesses and 1.5 million deaths every year, according to new data released by the World Health Organization (WHO). This significant public health burden hits the youngest members of society the hardest; despite representing only nine per cent of the global population, children under five years old account for nearly one-third of all foodborne disease cases. As the world marks World Food Safety Day on June 7, 2026, the WHO has underscored that these illnesses—often manifesting as severe diarrhoeal diseases—are not an abstract concern but a daily threat to families worldwide. According to the UN health agency, the human and economic costs of contaminated food have historically been underestimated, but new research now provides a clearer, more urgent picture of the scale of the problem.
The Hidden Toll of Chemical Contamination
While biological hazards like bacteria, viruses, and parasites are responsible for the vast majority of foodborne illnesses—totaling about 860 million cases in 2021—chemical contaminants drive a disproportionate share of fatalities. Data from the WHO indicates that chemical hazards accounted for 73 per cent of deaths linked to unsafe food in 2021. Among these, inorganic arsenic and lead are the primary contributors, as prolonged exposure to these substances is known to increase the risk of heart disease and various cancers. Together, these two substances were linked to more than one million deaths in a single year. Furthermore, exposure to other chemicals, such as methylmercury, can cause lifelong neurological and developmental damage to children by impacting their developing brains.
A Crisis of Global Inequality
The burden of foodborne disease is not distributed evenly across the globe. Regional inequalities remain stark, with the African and South-East Asian regions bearing the heaviest load, accounting for nearly three-quarters of all foodborne illnesses and 60 per cent of global deaths. As the WHO Director-General Tedros Adhanom Ghebreyesus stated, food safety affects every meal and every family, yet until now, the world lacked the comprehensive data needed to understand the full human and economic toll. These new estimates are intended to serve as a roadmap for governments, allowing them to identify where the burden is highest and to prioritize targeted interventions to protect public health. The economic impact is equally staggering; in 2021, foodborne diseases led to approximately US$ 310 billion in lost productivity globally, a figure that rises to US$ 647 billion when adjusted for cost-of-living differences between countries.
Expanding the Evidence Base
The WHO’s updated analysis represents a significant leap in understanding by assessing 42 major foodborne hazards across 194 countries from 2000 to 2021. This expanded scope now includes formerly under-represented hazards such as metals, rotavirus, and Trypanosoma cruzi, the parasite responsible for Chagas disease. Despite this progress, experts note that critical data gaps persist. Hazards such as antimicrobial-resistant bacteria, pesticide residues, and per- and polyfluoroalkyl substances (PFAS) were excluded from these current estimates due to insufficient data. This underscores an urgent need for increased investment in national surveillance and research to better characterize the full extent of the risks posed by more than 200 known biological and chemical hazards.
Pathways to Progress
Preventing these illnesses requires a multifaceted approach that addresses contamination at the source. The WHO is calling on governments to implement stricter industrial controls, improve agricultural practices, and strengthen environmental regulations to keep hazardous substances out of the food chain. Yuki Minato, a WHO technical officer for food safety, emphasizes that the situation is being exacerbated by climate change, which increases contamination risks, and by antimicrobial resistance, which makes foodborne infections significantly harder to treat. A “One Health” approach—which integrates human, animal, plant, and environmental health—is essential to breaking down the silos that currently hinder effective prevention. Countries are encouraged to use the newly released data and interactive tools available on the WHO Global Health Observatory to target resources and strengthen multisectoral collaboration. As the global community observes World Food Safety Day, the message from health officials is clear: delay in addressing these food systems’ failures costs lives.
The key findings from this assessment are published in The Lancet Global Health. Experts from the WHO were scheduled to present these findings during a webinar on June 4, 2026, to discuss the implications of the 2026 edition of the foodborne disease estimates. For those looking to engage with this issue, the WHO provides an interactive online dashboard to help track these threats at a national level.