WHO Reveals Staggering Global Burden of Foodborne Diseases and Health Risks

Children under the age of five face nearly three times the risk of illness from unsafe food compared to older children and adults, according to new global estimates released by the World Health Organization (WHO). The findings highlight a critical public health issue, with young children accounting for nearly one-third of all foodborne disease cases despite making up just 9% of the global population. Diarrheal diseases, often linked to contaminated food and water, are a leading cause of illness and death in this vulnerable group, while exposure to chemical hazards like methylmercury and lead can cause lifelong neurological and developmental damage.

WHO estimates that unsafe food causes approximately 866 million illnesses and 1.5 million deaths annually, many of which could be prevented through improved water, sanitation, hygiene, and food safety practices. While the overall burden of foodborne diseases has declined since 2000, significant regional disparities persist, with Africa and South-East Asia bearing the heaviest toll. In 2021, biological hazards such as bacteria, viruses, and parasites accounted for about 860 million illnesses, while chemical contaminants like inorganic arsenic and lead were responsible for 73% of foodborne deaths.

Children at Greatest Risk

Young children are disproportionately affected by unsafe food, with diarrheal diseases remaining a leading cause of mortality in this age group. The WHO report underscores that exposure to chemical hazards, including lead and methylmercury, poses unique risks to developing brains, potentially leading to cognitive impairments and developmental delays. Inorganic arsenic and lead alone are linked to over 1 million deaths annually, while methylmercury exposure is tied to lifelong neurological harm in children.

“Food safety is not an abstract issue—it touches every meal, every family, every day,” said Dr. Tedros Adhanom Ghebreyesus, WHO Director-General. “These new estimates provide a clearer picture of the human and economic toll of unsafe food, empowering countries to prioritize interventions that protect their most vulnerable populations.”

Chemical Hazards and Deadly Consequences

Chemical contaminants are a growing concern, with inorganic arsenic and lead driving the majority of foodborne deaths. These substances, often introduced through natural sources or industrial activities, contaminate the food chain and are difficult to remove once present. The WHO warns that long-term exposure to these metals increases the risk of heart disease, cancer, and other chronic conditions, disproportionately affecting low- and middle-income countries where regulatory frameworks may be less robust.

The report also reveals for the first time the burden of cardiovascular diseases, cancers, and intellectual disabilities linked to dietary exposure to metals. “Preventing contamination at the source is critical,” said Yuki Minato, WHO technical officer for food safety. “This requires better agricultural practices, stricter industrial controls, and stronger environmental regulations to safeguard public health.”

Economic Impact of Foodborne Diseases

Beyond health consequences, foodborne diseases impose a staggering economic burden, costing an estimated $310 billion in lost productivity in 2021. When adjusted for regional cost-of-living differences, this figure rises to $647 billion. The economic toll underscores the need for targeted investments in food safety infrastructure, particularly in regions with limited resources.

“These numbers are a wake-up call,” Minato added. “Climate change and antimicrobial resistance are