9 guides
Immune & Infectious
Allergy, autoimmune, viral, bacterial, and sexually transmitted infection guides.
Allergies
Allergies happen when the immune system overreacts to a normally harmless substance such as pollen, pet dander, food, or insect stings. The immune system.
RespiratoryCOVID-19
COVID-19 is an infectious respiratory illness caused by the SARS-CoV-2 coronavirus. It ranges from no symptoms at all to severe pneumonia requiring.
DigestiveHepatitis
Hepatitis is inflammation of the liver, most commonly caused by viral infection (hepatitis A, B, C, D, or E). It can also result from alcohol, medications.
Immune & InfectiousHIV/AIDS
HIV (Human Immunodeficiency Virus) attacks and weakens the immune system by destroying CD4 cells (T-helper lymphocytes). Without treatment, the immune.
Immune & InfectiousLupus
Systemic lupus erythematosus (SLE) is a chronic autoimmune condition in which the immune system attacks healthy tissue throughout the body. It can affect.
Immune & InfectiousLyme disease
Lyme disease is a bacterial infection caused by Borrelia burgdorferi, transmitted through bites from infected deer ticks (Ixodes species). Most cases.
Immune & InfectiousMononucleosis
Infectious mononucleosis (glandular fever) is a viral illness caused by Epstein-Barr virus (EBV). It most commonly affects teenagers and young adults.
Immune & InfectiousSexually transmitted infections
Sexually transmitted infections (STIs) are infections passed from person to person primarily through sexual contact. Common STIs include chlamydia.
Immune & InfectiousShingles
Shingles (herpes zoster) is a viral infection causing a painful blistering rash, caused by reactivation of the varicella-zoster virus (VZV), which also.