A to Z Disease List

Infectious Diseases

Infectious diseases are those that are transmitted from one individual to another. These diseases, also known as contagious diseases, are caused by microorganisms, such as protozoa, fungi, viruses, and bacteria, that invades the body and causes a series of changes that leads to infection and damage to the body. Infectious diseases are one that can be transmitted by direct or indirect contact or through the air. While most infectious diseases last a short amount of time they can be quite serious, and sometimes fatal.

What You Should Do

  • Prevent the spread of disease more
  • Make sure that you and your children are up to data on your immunizations more

Diseases & Conditions of Concern

Bioterrorism Agents

Foodborne Illnesses

Flu & other Respiratory Diseases


It is common to get sick from respiratory viruses such as COVID-19, flu, and respiratory syncytial virus (RSV), especially in the fall and winter. There are actions you can take to protect yourself and others. Learn about whether you’re more likely to get seriously ill, how to prevent these viruses, what to do if you get sick, and if these viruses are spreading in your community. Learn More


Healthcare Acquired Infections



Lice, Head and Body Lice (Pediculosis)

Mosquito Related Diseases

Nervous System Disease (Acute Flaccid Myelitis)

Rabies & Animal Bites

Sexually Transmitted Diseases

Tuberculosis (TB)

Tick-Borne Diseases

Tick-Borne Diseases page

Vaccine Preventable Diseases

Viral Hemorrhagic Fevers