Illnesses produced by organisms, such as bacteria, viruses, fungus, or parasites, are called infectious diseases. Numerous microorganisms live on our bodies, both inside and outside. They don't usually cause any harm and sometimes even contribute. But certain organisms may cause sickness if they are in some environment. There are infectious illnesses that can be spread from person to person. People whose immune systems are weakened or repressed for any reason, such as those undergoing chemotherapy for cancer, those living with HIV, and those taking particular medications.Persons under the age of 18, women who are expecting, and people above the age of 60. In the case of infectious infections, prompt medical attention and a proper diagnosis are crucial
