The flu is a common contagious viral infection that attacks the respiratory system. Learn about symptoms and treatment.
Pneumonia is an infection that inflames air sacs, which may fill with fluid, in the lungs. 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.
Sudden cardiac arrest occurs when the heart stops pumping, and is a leading cause of death in the United States. Learn about symptoms and treatment.
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.