Global study links common virus to millions of annual cancer cases worldwide

A recent global study estimates that roughly 2.3 million new cancer cases worldwide in the year 2024 were linked to various infections. The project was carried out by the specialized cancer research body operating under the World Health Organization. The findings bring fresh attention to the Epstein-Barr virus, which is also referred to as human herpesvirus 4 and belongs to the wider herpesvirus family.

Spread and Symptoms

More than 90% of adults globally are estimated to contract this pathogen during their lifetime. Transmission happens mainly through saliva contact, including kissing, sharing drinks, or passing around food items, utensils, and toothbrushes. Many individuals pick up the germ in their early years without showing any signs of illness. When symptoms do appear, usually in teenagers or older adults, they can include a high fever, sore throat, swollen lymph nodes, and extreme tiredness. Doctors often diagnose infectious mononucleosis using physical exams and blood tests that check for specific antibodies.

Cancer Risks

The research body classifies this pathogen as a Group 1 cancer-causing agent. It has established links to several malignancies, including nasopharyngeal carcinoma, Burkitt lymphoma, Hodgkin lymphoma, and newly incorporated evidence pointing to gastric cancer. Even so, catching the germ does not mean a person will definitely develop cancer, as the vast majority of infected individuals never face that outcome. Additional triggers beyond the pathogen itself typically play a role, and individuals with compromised immune systems face higher risks of severe illness.

Treatment and Prevention

There is currently no cure to clear the virus completely from the body, and no vaccine is available yet to prevent initial infection. Antibiotics do not work against it because it is a viral agent, meaning medical care for ordinary mononucleosis focuses mainly on rest, fluids, and managing pain or fever. Health authorities recommend avoiding the sharing of personal items that touch saliva to help lower transmission rates, while scientists continue to study potential preventive vaccines.

Context

Global health bodies frequently track infectious agents to understand their broader impact on public health and long-term disease trends. While many common viruses remain dormant in the human body for life without causing severe harm, ongoing scientific research helps identify which specific factors increase the likelihood of dangerous health complications.