Fitness basics
Learning Center
Mosquito bites
Learn about the many ways to prevent mosquito bites and how to ease the itch if you are bitten.
Neuroblastoma
Learn more about the symptoms, diagnosis and treatment of neuroblastoma, one of the most common cancers of childhood.
Bacterial vaginosis
Learn about symptoms, treatments and prevention of this common vaginal condition.
Meningitis
Spot the signs and understand the treatment options for meningitis, an infection that has several possible causes.
Heavy menstrual bleeding
Learn about the causes and treatment of heavy menstrual periods.
Invasive lobular carcinoma
Breast cancer that begins in the milk-producing glands of the breast is uncommon. Learn what sets lobular carcinoma apart from other breast cancer types.
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.
Chiari malformation
Learn about this brain condition in which brain tissue extends into the spinal canal.
Patent ductus arteriosus (PDA)
Learn about symptoms, causes and treatment of this common — and treatable — heart problem that occurs shortly after birth.
Painful intercourse (dyspareunia)
Pain during sex can happen for many reasons, ranging from physical conditions to emotional concerns. Medicines or other therapies may help.
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