Infectious Diseases

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The Health Department monitors the health of the community by tracking disease and identifying emerging health issues.

What is an infectious disease?

Infectious diseases are illnesses caused by germs (such as bacteria, viruses, and fungi) that enter the body, multiply, and can cause an infection. Some infectious diseases are contagious (or communicable), meaning they are capable of spreading from one person to another. Other infectious diseases can be spread by germs carried in air, water, food, or soil. They can also be spread by vectors (like biting insects) or by animals to humans. 

Massachusetts law mandates healthcare providers and laboratories to report over 80 diseases or conditions to local health departments. Some examples of the reportable communicable diseases include Hepatitis A, B & C, influenza, measles, and salmonella and other food borne illnesses.

How does the Dedham Health Department respond to infectious disease(s)?

The Health Department works closely with the MA Department of Public Health to conduct surveillance of infectious diseases, and investigates communicable disease outbreaks in Dedham. 

To report an infectious disease or if you have a question about an infectious disease, please call the Health Department at (781) 751-9220.

Disease-Specific Information

  • Flu: The flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs. It can cause mild to severe illness, and at times can lead to death. The best way to prevent flu is by getting a flu vaccine each year.
  • RSV: RSV is is a common respiratory virus that usually causes mild, cold-like symptoms. Most people recover in a week or two. But, infants and older adults are more likely to develop severe RSV and may need hospitalization. If you are age 60 or older, a vaccine is available to protect you from severe RSV. Talk to your healthcare provider to see if it’s right for you.
  • Norovirus: Norovirus is the leading cause of vomiting and diarrhea, and foodborne illness in the United States. People of all ages can get infected and sick with norovirus, which spreads very easily and quickly.
  • Tuberculosis (TB): TB is caused by a bacteria usually attack the lungs, but TB bacteria can attack any part of the body such as the kidney, spine, and brain. Not everyone infected with TB bacteria becomes sick. Some people may have latent TB which is not contagious and they do not feel sick. 

Resources for residents with infectious disease(s)