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  1. Germs: Protect against bacteria, viruses and infections

    Mar 5, 2024 · Viruses are responsible for causing many diseases, including: Common cold. Influenza. Measles. Chickenpox and shingles. Coronavirus disease 2019, also called COVID-19. Antibiotics kill …

  2. Bacterial vs. viral infections: How do they differ? - Mayo Clinic

    Nov 25, 2025 · Viruses that become resistant to antivirals have affected treatment, including for genital herpes, HIV and, in 2008, for influenza (flu). Treating and preventing bacterial and viral infections In …

  3. Infectious diseases - Symptoms & causes - Mayo Clinic

    Apr 8, 2025 · Bacteria, viruses, fungi and parasites are examples of organisms that can cause illness. Many organisms live in and on our bodies. They're too small to see with the eyes. And they're often …

  4. Influenza (flu) - Symptoms and causes - Mayo Clinic

    Dec 6, 2025 · Influenza viruses are constantly changing, with new strains appearing often. A person's first flu infection gives some long-term protection against similar strains of flu. But the vaccines …

  5. Infectious diseases - Diagnosis & treatment - Mayo Clinic

    Apr 8, 2025 · Viruses, bacteria, fungi and parasites all can cause infections. Find out more about how to prevent and treat these conditions.

  6. Human metapneumovirus (HMPV): Symptoms and prevention

    Feb 19, 2025 · Human metapneumovirus (HMPV) is a seasonal virus that causes respiratory illness worldwide. Explore symptoms and ways to prevent infection.

  7. Diarrhea - Symptoms and causes - Mayo Clinic

    Jan 18, 2025 · Causes A number of diseases and conditions can cause diarrhea, including: Viruses. Viruses that can cause diarrhea include Norwalk virus, also known as norovirus, enteric …

  8. Viral gastroenteritis (stomach flu) - Mayo Clinic

    Apr 30, 2025 · Viral gastroenteritis is an intestinal infection that includes signs and symptoms such as watery diarrhea, stomach cramps, nausea or vomiting, and sometimes fever. The most common way …

  9. Debunking COVID-19 myths - Mayo Clinic

    Oct 24, 2025 · No. Viruses can only spread between living beings and can't travel on radio waves and mobile networks. Most often, this myth calls out 5G mobile networks. But the COVID-19 virus has …

  10. Common cold - Symptoms and causes - Mayo Clinic

    May 24, 2023 · Germs called viruses cause a common cold. Often, adults may have two or three colds each year. Infants and young children may have colds more often. Most people recover from a …