GENEVA – Contaminated food is killing 1.5 million people globally every year, the World Health Organization (WHO) warned Thursday, highlighting a systemic failure in global food safety that disproportionately affects young children and the world’s most impoverished regions.
The findings, based on a comprehensive analysis of 194 countries between 2000 and 2021, reveal a staggering scale of morbidity: approximately 886 million people contract an illness linked to unsafe food annually. The agency noted that children under the age of five are nearly three times more likely to be at risk than the general population, often due to underdeveloped immune systems and the compounding effects of malnutrition.
This crisis represents a critical bottleneck in the pursuit of the United Nations Sustainable Development Goals, specifically those targeting zero hunger and good health. While food security focuses on the availability of calories, food safety addresses the biological and chemical integrity of those calories-a distinction that determines whether a meal sustains life or introduces lethal pathogens.
“Food safety is not an abstract issue – it touches every meal, every family, every day,” said WHO chief Tedros Adhanom Ghebreyesus.
Public-health agencies stress that many of the most common risks stem from everyday products such as raw poultry, unpasteurized milk and cheese, undercooked eggs and meat, and even raw flour and dough, where invisible germs can survive home cooking shortcuts.[1]
Regional Disparities and Infrastructure Gaps
Although global trends show a general decline in food-borne illnesses since the turn of the century, the WHO report underscores a widening gap between the Global North and South. Africa and Southeast Asia now account for nearly three-quarters of all food-related ailments and 60% of all deaths worldwide.
These figures reflect deeper structural inequalities, including:
- Lack of reliable cold-chain infrastructure, such as refrigerated transport and storage, which allows bacteria to proliferate as food moves from farms to markets.
- Limited access to clean water for crop irrigation, food processing, and household food preparation.
- Weak regulatory frameworks and under-resourced food-inspection regimes in emerging markets, leaving informal markets and small producers with little oversight.
In many low- and middle-income countries, food is sold through informal street and wet markets that operate largely outside formal inspection systems. That reality, WHO officials say, turns basic food hygiene and safe handling into questions of governance capacity and budget priorities rather than individual consumer choice.
The Duality of Biological and Chemical Threats
The nature of the risk varies by the type of contaminant. In 2021, biological hazards-primarily bacteria, viruses, and parasites-were responsible for the vast majority of the 860 million illness cases reported. These pathogens, including Salmonella, E. coli and Campylobacter, often stem from poor hygiene, inadequate cooking temperatures, cross-contamination in kitchens, and unsafe storage conditions.[2]
However, the report finds a more lethal correlation regarding chemical contaminants. While biological agents cause more frequent illness, chemical ingestion is responsible for a disproportionate share of total deaths. Arsenic and lead poisoning were identified as the primary non-biological culprits, often linked to industrial pollution, contaminated groundwater used in agriculture, and the use or misuse of toxic pesticides.
Public-health experts warn that chemical exposures can also trigger chronic conditions-including certain cancers, neurological damage, and developmental disorders-that rarely appear in acute outbreak statistics but carry heavy lifetime costs for health systems.
Environmental Drivers and Antimicrobial Resistance
The WHO warns that the fight against food-borne disease is being undermined by two escalating global crises: climate change and the rise of “superbugs.”
Yuki Minato, WHO technical officer for food safety, noted that the data show food-borne diseases are persistent and are being exacerbated by environmental shifts. Rising global temperatures increase the proliferation of pathogens in food supplies, while extreme weather events-such as flooding-often contaminate clean water sources with sewage and agricultural runoff.
Simultaneously, antimicrobial resistance (AMR) is complicating treatment. The overuse and misuse of antibiotics in livestock and aquaculture has led to the evolution of bacteria that no longer respond to standard medical interventions, turning once-treatable food-borne infections into potentially fatal conditions. Health authorities view food systems as a key front in the broader “One Health” effort to align human, animal, and environmental policies against AMR.
Regulation, Governance and Global Standards
In response to the rising toll, WHO is pressing governments to move beyond ad hoc responses to outbreaks and invest in end-to-end food-safety systems-from farm-level practices and slaughterhouse controls to border inspections and restaurant oversight.
A cornerstone of that approach is the [3]Codex Alimentarius, a joint WHO-Food and Agriculture Organization collection of internationally recognized standards, guidelines, and codes of practice. While voluntary, Codex benchmarks are widely used by national regulators when drafting food laws and by trade negotiators and dispute panels as the reference point for what counts as safe food in international commerce.
For ministries of health, agriculture, and trade, aligning domestic rules with Codex can unlock export markets but often requires politically difficult investments in laboratories, inspectorates, and surveillance systems-costs that many low-income states struggle to meet without external financing.
The Economic Cost of Contamination
The impact of unsafe food extends beyond public health, acting as a significant drag on global economic growth. The study estimates that food-borne diseases cost the world economy $647 billion in lost productivity in 2021 alone.
These losses are driven by healthcare expenditures, long-term disability, and the loss of labor hours, particularly among working-age adults and caregivers for sick children. For developing economies, these costs are especially devastating, as a single major outbreak can wipe out the earnings of small-scale farmers, shutter local food businesses, or trigger import bans that abruptly close off vital export markets.
Regulators and international agencies argue that every dollar invested in prevention-through stronger inspection regimes, safer processing facilities, and public education on basic food hygiene-yields multiple dollars in avoided medical bills and trade disruptions. Yet as WHO’s latest figures suggest, food safety remains chronically underfunded compared with other public-health priorities, even as the global burden of food-borne disease remains stubbornly high.[3]
