Having an infectious disease
Hepatitis C or B, HIV, HPV, Epstein-Barr Virus (EBV)… Worldwide, infections are linked to about 15 to 20 percent of cancers, according to the American Cancer Society. Some viruses and bacteria can cause cancer or at least significantly increase the risk of developing cancer.
They do so by disrupting the signaling that keeps cell growth and proliferation in check.
