Germs: Protect against bacteria, viruses and infections
2024年3月5日 · Viruses are responsible for causing many diseases, including: Common cold. Influenza. Measles. Chickenpox and shingles. Coronavirus disease 2019, also called COVID-19. Antibiotics kill or block activities bacteria need to live or grow, but antibiotics don't work on viruses. Medicine that treats viral infections is called an antiviral.
Infection: Bacterial or viral? - Mayo Clinic
2023年2月4日 · Viruses. Viruses are bits of genetic information, either RNA or DNA, surrounded by protein. A virus needs a living host, such as a person, plant or animal. 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:
Viral gastroenteritis (stomach flu) - Mayo Clinic
Viral gastroenteritis (stomach flu) - Mayo Clinic
Cold and flu viruses: How long can they live outside the body?
2024年2月24日 · Some viruses are better than others at managing temperature, humidity or other conditions. The climate and the indoor environment. This includes humidity, airflow, sunlight and temperature. The surface the virus lands on. Some viruses remain infectious for longer on hard surfaces. Others stay more infectious on fabrics.
Common cold - Symptoms and causes - Mayo Clinic
2023年5月24日 · Many viruses can cause a common cold. Rhinoviruses are the most common cause. A cold virus enters the body through the mouth, eyes or nose. The virus can spread by: Droplets in the air when someone who is sick coughs, sneezes or talks. Hand-to-hand contact with someone who has a cold.
Respiratory syncytial virus (RSV) - Symptoms & causes - Mayo Clinic
Respiratory syncytial virus (RSV) - Symptoms & causes - Mayo Clinic
Diarrhea - Symptoms and causes - Mayo Clinic
5 天之前 · Viruses. Viruses that can cause diarrhea include Norwalk virus, also known as norovirus, enteric adenoviruses, astrovirus, cytomegalovirus and viruses that cause hepatitis. Rotavirus is a common cause of sudden childhood diarrhea.
COVID-19 vs. flu: Similarities and differences - Mayo Clinic
2023年7月22日 · COVID-19 and the flu are caused by different viruses. COVID-19 is caused by a coronavirus called SARS-CoV-2, while flu is caused by influenza A and B viruses. COVID-19 and flu symptoms. Symptoms of COVID-19 and the flu appear at different times and have some differences. COVID-19 symptoms generally appear 2 to 14 days after exposure. Flu ...
Norovirus infection - Symptoms & causes - Mayo Clinic
2022年3月4日 · For most people, norovirus infection usually clears up within a few days and isn't life-threatening. But in some people — especially young children; older adults; and people with weakened immune systems or other medical conditions or who are pregnant — norovirus infection can be severe.
Hantavirus pulmonary syndrome - Symptoms & causes - Mayo Clinic
Hantavirus pulmonary syndrome - Symptoms & causes - Mayo Clinic