9 guides
Immune & Infectious
Allergy, autoimmune, viral, bacterial, and sexually transmitted infection guides.
Allergies
Allergies happen when your immune system reacts to something that is usually harmless. Learn the common symptoms, how reactions are treated, and when swelling or breathing problems need emergency help.
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 causes a painful blistering rash and should be assessed promptly, especially on the face or near the eye. Learn how early treatment can help and who should seek same-day advice.