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X-linked agammaglobulinemia
This genetic disease weakens the immune system, mainly in males, and leads to having infections often.
Coronavirus disease 2019 (COVID-19)
Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and ways to protect yourself.
COVID-19 vs. flu: Similarities and differences
Find out the similarities and differences between coronavirus disease 2019 (COVID-19) and the flu (influenza) and learn about ways to prevent getting these diseases.
Acute flaccid myelitis (AFM)
Know the possible symptoms of acute flaccid myelitis (AFM), a rare but serious condition that affects young children.
Multisystem inflammatory syndrome in children (MIS-C) and COVID-19
Learn about symptoms of MIS-C, a serious condition linked to coronavirus disease 2019 (COVID-19). Get help fast if your child shows any signs.
Can vitamin D protect against coronavirus disease 2019 (COVID-19)?
Find out what the research says about vitamin D and coronavirus disease 2019 (COVID-19).
Post-vasectomy pain syndrome
Learn about post-vasectomy pain syndrome (PVPS) — How it happens after a vasectomy, tests to diagnose it and treatment options.
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
Congenital myasthenic syndromes
These rare hereditary conditions result in a problem in nerve stimulation, causing muscle weakness that worsens with physical activity.
Inherited metabolic disorders
Caused by gene changes, these disorders affect the body's ability to change food into energy. They also affect how energy is used, such as for cell repair.
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