After an individual becomes infected, the immune system develops antibodies against that infectious agent.
virus | influenza | West Nile virus | avian influenza | RNA virus | Influenza | Herpes simplex virus | computer virus | Human T-lymphotropic virus | Computer virus | Avian influenza | Virus | Influenza A virus subtype H1N1 | Herpes Simplex Virus | Ebola virus | Virus Buster Serge | Vesicular stomatitis virus | varicella zoster virus | Uganda Virus Research Institute | Tobacco Mosaic Virus | Swine Influenza | Swine influenza | Sin Nombre virus | Ross River virus | Porcine reproductive and respiratory syndrome virus | Lactate dehydrogenase elevating virus | Human respiratory syncytial virus | herpes simplex virus | Feline immunodeficiency virus | Epstein-Barr virus |