What Is an Infectious Disease?

An infectious disease (ID) is a disease caused by germs such as bacteria, viruses, and fungi. While these germs are mostly harmless, and sometimes even helpful, there are some cases in which the germs that enter the body multiply and cause infections with a wide range of symptoms.
Infections can cause serious illnesses if they affect vital organs, such as the heart, brain, or liver. They can also spread through the blood stream to cause widespread symptoms in our bodies.
Some individuals, like those with compromised immune systems or those who take medications that suppress the immune system, may be more likely to be affected by these types of diseases.
Learn more about Emerging & Zoonotic Infectious Diseases (CDC); or check out Facts About Infectious Diseases.
An infectious disease (ID) is a disease caused by germs such as bacteria, viruses, and fungi. While these germs are mostly harmless, and sometimes even helpful, there are some cases in which the germs that enter the body multiply and cause infections with a wide range of symptoms.
Infections can cause serious illnesses if they affect vital organs, such as the heart, brain, or liver. They can also spread through the blood stream to cause widespread symptoms in our bodies.
Some individuals, like those with compromised immune systems or those who take medications that suppress the immune system, may be more likely to be affected by these types of diseases.
Learn more about Emerging & Zoonotic Infectious Diseases (CDC); or check out Facts About Infectious Diseases.