Geveva– On World Cancer Day, the World Health Organization (WHO) and its International Agency for Research on Cancer (IARC) issued a reminder that a massive portion of the world’s cancer burden is avoidable, releasing new data showing nearly 7.1 million cancer cases in 2022 were linked to preventable causes.

The core finding is unequivocal: up to 4 in 10 cancer cases worldwide could be prevented through targeted interventions against known risk factors. This translates to millions of premature deaths and immeasurable suffering that could be averted through stronger public health policies and individual lifestyle changes.

The new global analysis for 2022 identifies a clear hierarchy of threats. Tobacco remains the single largest preventable driver, responsible for a staggering 15% of all new cancer cases globally. Infections like human papillomavirus (HPV) and hepatitis B and C viruses account for 10% of cases, while alcohol consumption is linked to 3%.

Beyond these primary risks, the report highlights other significant contributors, including air pollution, physical inactivity, high body weight, and excessive exposure to ultraviolet (UV) radiation.

“Cancers like those of the lung, stomach, and cervix make up nearly half of these preventable cases,” a WHO spokesperson stated. “This is not merely a statistical exercise; it is a roadmap for action. It demonstrates that a massive reduction in cancer incidence is within our grasp, not solely through advanced treatment, but through proven, cost-effective preventive measures.”

The WHO outlined a dual-path strategy for progress. For governments, it calls for accelerated implementation of tobacco control measures, universal vaccination programs against HPV and hepatitis B, and policies that promote clean air, physical activity, and healthy diets.

For individuals, the agency reiterates fundamental advice: avoid tobacco and limit alcohol, stay active and maintain a healthy weight, get vaccinated, and protect skin from excessive sun exposure.

“Prevention is powerful,” said Dr. Andre Ilbawi of the WHO’s Department of Noncommunicable Diseases. “This data underscores that investing in prevention is an ethical and economic imperative. Together, by addressing these risk factors, we can reduce the cancer burden and build healthier communities.”

The release of this analysis on World Cancer Day serves as a critical call to action, urging a decisive shift from merely treating cancer to systematically preventing it.