Long COVID refers to new or recurring symptoms that occur four or more weeks after an infection with SARS-CoV-2, the virus that causes COVID-19.
Fatigue is a common side effect of treatment for cancer. Learn more about symptoms and treatment.
Chronic stress is a consistent sense of feeling pressured and overwhelmed for a long period of time. Learn about symptoms and treatment.
COVID-19 is the disease caused by the SARS-CoV-2, the 2019 novel coronavirus.
Coronavirus is a term describes a family of viruses, common in both animals and humans.
Lyme disease is a tick-borne infection that can lead to neurological complications. Learn about symptoms and treatment.
There are all sorts of ways to get an infectious disease—from people and animals, to eating contaminated foods, to environmental exposure.