Coronavirus disease 2019 (COVID-19) - Symptoms and causes
COVID-19, also called coronavirus disease 2019, is an illness caused by a virus. The virus is called severe acute respiratory syndrome coronavirus 2, or more commonly, SARS-CoV-2. It started spreading at the end of 2019 and became a pandemic disease in 2020.
Germs: Protect against bacteria, viruses and infections
2024年3月5日 · There's a difference between infection and disease. Infection, often the first step in getting a disease, occurs when bacteria, viruses or other microbes that cause disease enter the body and begin to multiply. Disease happens when the infection damages cells in the body. Then symptoms of an illness appear.
Coronavirus disease 2019 (COVID-19) - Mayo Clinic
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.
Infectious diseases - Symptoms & causes - Mayo Clinic
2022年2月18日 · Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful.
Infection: Bacterial or viral? - Mayo Clinic
2023年2月4日 · To spread, a virus gets into a host's body and then into the host's cells. Then it takes over the host cell's machinery, using it to make more of the virus. Diseases caused by viruses include: COVID-19, caused by a coronavirus called SARS-CoV-2. Chickenpox, caused by the varicella-zoster virus. HIV, caused by the human immunodeficiency virus.
Respiratory syncytial virus (RSV)
2023年10月4日 · Respiratory syncytial virus (RSV) causes infections of the lungs and respiratory tract. It's so common that most children have been infected with the virus by age 2. Respiratory syncytial (sin-SISH-ul) virus can also infect adults.
Influenza (flu) - Symptoms and causes - Mayo Clinic
2025年1月7日 · The flu is caused by a virus. Influenza viruses are different from the "stomach flu" viruses that cause diarrhea and vomiting. Most people with the flu get better on their own.
HIV/AIDS - Symptoms and causes - Mayo Clinic
2024年2月9日 · Acquired immunodeficiency syndrome (AIDS), is an ongoing, also called chronic, condition. It's caused by the human immunodeficiency virus, also called HIV. HIV damages the immune system so that the body is less able to fight infection and disease.
West Nile virus: What you need to know - Mayo Clinic News …
2023年7月3日 · "West Nile virus is the leading cause of mosquito-borne illness in the U.S.," says Dr. Bobbi Pritt, director of the Clinical Parasitology Laboratory at Mayo Clinic. It's a flavivirus —a specific type of RNA virus that can infect humans, birds and horses.
Hantavirus pulmonary syndrome - Symptoms & causes - Mayo Clinic
2022年1月7日 · Hantavirus pulmonary syndrome is a rare infectious disease that begins with flu-like symptoms and progresses rapidly to more severe disease. It can lead to life-threatening lung and heart problems. The disease is also called hantavirus cardiopulmonary syndrome.