Opportunistic viruses, like cytomegalovirus (CMV), Epstein-Barr virus (EBV), and herpes simplex virus (HSV), infect people with weakened immune systems, such as those with HIV/AIDS or transplant patients. These pathogens stay dormant but activate during immunosuppression, causing severe infections or cancers like Kaposi’s sarcoma. They spread through bodily fluids or hospital settings and are diagnosed with […]