Germs: Protect against bacteria, viruses and infections
Mar 5, 2024 · Learn how to protect against bacteria, viruses and infections.
Bacterial vs. viral infections: How do they differ? - Mayo Clinic
Nov 25, 2025 · Bacteria cause bacterial infections. Viruses cause viral infections. Antibiotic medicines kill or keep many bacteria from growing but don't treat viruses. Antiviral medicines help the body …
Types of infectious agents - Mayo Clinic
Infectious agents come in many shapes and sizes. Bacteria and protozoans are microscopic one-celled organisms. Viruses are even smaller. Fungi grow like plants. Helminths resemble worms.
Dengue fever - Symptoms and causes - Mayo Clinic
Jul 17, 2024 · The two types of mosquitoes that most often spread the dengue viruses are common both in and around human lodgings. When a mosquito bites a person infected with a dengue virus, the …
What's the difference between H1N1 flu and influenza A?
Jul 4, 2024 · How do different types of flu get named and what do those names mean? Flu, also called influenza, is a viral infection of the nose, throat and lungs, which are part of the respiratory system. …
HPV infection - Symptoms & causes - Mayo Clinic
Sep 19, 2025 · HPV infection is a viral infection. There are more than 100 types of human papillomavirus (HPV). Some types of HPV infection cause skin growths called warts and some types of HPV …
Hepatitis B and Hepatitis C: What’s the difference? - Mayo Clinic
6 days ago · A virus causes most types of hepatitis. Two of the most common ones are hepatitis B (HBV) and hepatitis C (HCV). Both HBV and HCV can make you sick and hurt your liver over time. …
Infectious diseases - Symptoms & causes - Mayo Clinic
Apr 8, 2025 · Infectious diseases can be caused by: Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis. Viruses. These …
Infectious diseases - Diagnosis & treatment - Mayo Clinic
Apr 8, 2025 · Some types of bacteria are especially prone to certain classes of antibiotics. Treatment can be targeted more precisely if your healthcare team knows what type of bacteria you're infected with.
How well do face masks protect against COVID-19? - Mayo Clinic
Oct 29, 2025 · Face masks can help slow the spread of coronavirus disease 2019 (COVID-19). Learn about mask types, which masks to use and how to use them.