Infectious Disease: Types, Causes & Treatments - Cleveland Clinic
https://my.clevelandclinic.org/health/diseases/17724-infectious-diseases
WebJun 6, 2022 · Infectious diseases are illnesses caused by harmful organisms (pathogens) that get into your body from the outside. Pathogens that cause infectious diseases are viruses, bacteria, fungi, parasites and, rarely, prions. You can get infectious diseases from other people, bug bites and contaminated food, water or soil.
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