Unsafe Food Kills 1.5 Million People a Year, WHO Warns
Unsafe food is causing an estimated 866 million illnesses and 1.5 million deaths every year, according to new World Health Organization estimates that place contaminated food among the world’s most serious but often overlooked public health threats.
The new figures, released ahead of World Food Safety Day, show that children under five carry a disproportionate share of the burden. Although they make up only 9% of the global population, young children suffer nearly one third of all foodborne disease cases, the World Health Organization said.
The warning is drawing attention because WHO’s updated assessment goes beyond common food poisoning. It includes biological hazards such as bacteria, viruses and parasites, along with chemical exposures including inorganic arsenic, lead and methylmercury.
WHO Releases New Foodborne Disease Estimates
The immediate trigger is WHO’s updated foodborne disease burden analysis, published on June 4, 2026, just days before World Food Safety Day on June 7.
The agency assessed 42 major foodborne hazards across 194 countries from 2000 to 2021, expanding the evidence base beyond earlier estimates that focused on fewer hazards.
According to the United Nations Office at Geneva, unsafe food causes hundreds of millions of illnesses annually and hits children hardest, particularly through diarrhoeal diseases that can become deadly in low-resource settings.
WHO said biological hazards caused most foodborne illnesses, accounting for approximately 860 million cases in 2021. Chemical hazards caused fewer illnesses overall but drove a much larger share of deaths.
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Chemicals in Food Are Driving a Large Share of Deaths
The most striking finding is the role of chemical contamination.
WHO said chemical hazards accounted for 73% of deaths linked to contaminated food in 2021. Most chemical-related deaths were tied to inorganic arsenic and lead, largely because long-term exposure increases the risk of heart disease and cancers.
The agency also warned that methylmercury can damage developing brains and cause lifelong neurological and developmental problems in children.
This is where the food safety issue becomes broader than kitchen hygiene. Some chemical contaminants enter food systems through industrial pollution, natural environmental sources, contaminated water, agricultural practices and supply-chain exposure.
Once metals enter soil, water or crops, they are often difficult to remove from the food chain.
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Africa and South-East Asia Carry the Heaviest Burden
The new estimates also show deep regional inequality.
WHO said the African and South-East Asian regions together account for nearly three quarters of all foodborne illnesses and 60% of global deaths linked to unsafe food.
Children and low-resource communities face the highest exposure because food safety depends on systems many families cannot control: clean water, sanitation, refrigeration, inspection capacity, safe agricultural practices and access to health care after infection.
The economic cost is also severe. WHO estimated that foodborne disease caused about US$310 billion in lost productivity in 2021. Adjusted for purchasing power differences between countries, the figure rises to US$647 billion.
That makes unsafe food not only a health issue but a development problem, straining health systems, weakening household income and disrupting trade, tourism and food markets.
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Food Safety Is Becoming Harder as Climate Risks Rise
The report lands at a moment when food systems are under pressure from climate change, antimicrobial resistance and increasingly global supply chains.
WHO technical officer Yuki Minato said foodborne diseases are being worsened by climate change, which can increase contamination risks, and antimicrobial resistance, which can make infections harder to treat.
The practical challenge for governments is that unsafe food does not have one single source. It can emerge from farms, slaughterhouses, water systems, industrial contamination, markets, restaurants or household preparation.
That makes surveillance and prevention harder than responding to a single outbreak after people become sick.
The strongest public-health systems will likely be those that connect food inspection, agriculture, environmental regulation and disease surveillance before contamination reaches families.
What Happens Next for Governments
WHO said the new national-level estimates are designed to help countries rank food safety risks and prioritize interventions.
The next phase will likely focus on stronger surveillance, source-level contamination prevention and more targeted investments in water, sanitation, pasteurization, inspections and health-care access for vulnerable populations.
The agency also noted that several hazards remain undercounted because of data gaps, including antimicrobial-resistant bacteria, pesticide residues and PFAS chemicals.
That means the current estimate may still be incomplete.
For families, food safety still begins with basic protections such as clean water, safe cooking, handwashing, proper storage and avoiding contaminated ingredients. But WHO’s latest data makes clear that household choices alone cannot solve a problem rooted in global food systems, environmental controls and public-health infrastructure.
Key Takeaways
- WHO estimates unsafe food causes 866 million illnesses and 1.5 million deaths every year.
- Children under five make up 9% of the global population but suffer nearly one third of foodborne disease cases.
- Chemical hazards accounted for 73% of deaths linked to contaminated food in 2021.
- Africa and South-East Asia account for nearly three quarters of illnesses and 60% of deaths.
- Foodborne disease caused an estimated US$310 billion in lost productivity in 2021.
Sources
- World Health Organization — Unsafe food causes 866 million illnesses and 1.5 million deaths annually
- World Health Organization — Food safety fact sheet
- United Nations Office at Geneva — Unsafe food kills 1.5 million people each year
- World Health Organization — Foodborne diseases
- World Health Organization — World Food Safety Day
