Infectious Diseases

Infectious diseases are illnesses caused by germs such as viruses, bacteria, and fungi. These germs can spread from person to person in different ways. They may spread through coughing, sneezing, touching contaminated surfaces, sharing items, or close contact with someone who is sick. Understanding how infectious diseases spread can help you take steps to protect yourself and those around you. 

Southwestern Public Health provides information about a variety of infectious diseases that affect our communities. Find resources on common illnesses, how they spread, symptoms to watch for, and steps you can take to prevent infection. Learn about respiratory illnesses such as influenza (flu), COVID-19, respiratory syncytial virus (RSV), measles, and avian flu. You can also access our A-Z list of infections for information on a wide range of diseases and health concerns.