WHO: Nearly four in ten cancer cases are preventable - Nearly 40% of 2022 cancer cases were preventable, new study reveals

Over 7 million cancer cases in 2022 could have been prevented, according to new research. Out of 18.7 million diagnoses worldwide, nearly four in ten were linked to avoidable risks. The findings highlight key factors driving cancer rates across different regions.

Tobacco use remains the leading cause, responsible for 15% of all new cancer cases. Cancer-causing infections, such as HPV, follow closely behind, accounting for 10%. Alcohol consumption also plays a role, contributing to 3% of diagnoses.

Lung, stomach, and cervical cancers make up nearly half of all preventable cases. Other major risk factors include obesity, lack of physical activity, UV radiation, and asbestos exposure. Regional differences were noted, with sub-Saharan Africa reporting the highest preventable rates for women at 38%, while North Africa and West Asia had the lowest at around 25%.

Researchers are now urging stronger global action. Stricter regulations on tobacco and alcohol have been recommended, alongside expanded vaccination programmes for infections like HPV. Improving air quality, enforcing workplace safety, and encouraging healthier lifestyles—such as better diets and more physical activity—are also key steps proposed to reduce future cases.

The study confirms that millions of cancer cases each year stem from preventable causes. Targeted policies, such as tighter controls on tobacco and broader vaccination efforts, could significantly lower future diagnoses. Regional differences in risk exposure further underline the need for tailored public health strategies.