https://www.medicalnewstoday.com/articles/196271.php

Aug 22, 2017 ... Infection refers to an invasion of the body by harmfulmicroorganisms or parasites. Infections range from mild swelling to fatal conditions.

https://www.webmd.com/a-to-z-guides/bacterial-and-viral-infections

Apr 23, 2019 ... Bacterial and viral infections have many things in common. Both types of infections are caused by microbes -- bacteria and viruses, respectively ...

https://www.mayoclinic.org/diseases-conditions/infectious-diseases/symptoms-causes/syc-20351173

Jan 3, 2018 ... Overview. Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and ...

https://medlineplus.gov/infections.html

Nov 1, 2018 ... Infections see Clostridium Difficile Infections · Campylobacter Infections ... Enterovirus see Viral Infections; Epstein-Barr Virus Infections see ...

https://en.wikipedia.org/wiki/Infection

Infection is the invasion of an organism's body tissues by disease-causing agents , their multiplication, and the reaction of host tissues to the infectious agents ...

https://medlineplus.gov/skininfections.html

Apr 3, 2019 ... Skin infections can be caused by bacteria, virus, fungus, or parasites. Impetigo is a type among kids. Shingles is a reactivation of chickenpox ...

https://medlineplus.gov/bacterialinfections.html

Apr 4, 2019 ... There are many types of bacterial infections. Learn about bacterial infections that can make you sick and how to treat them.

https://www.cancerresearchuk.org/about-cancer/coping/physically/fever/causes/infection/types

Cancer and cancer treatments can make it more likely for you to get an infection. Find out more about how you could be affected.

https://www.medicinenet.com/script/main/art.asp?articlekey=12923

Infection: The invasion and multiplication of microorganisms such as bacteria, viruses, and parasites that are not normally present within the body. An infection  ...

https://kidshealth.org/en/teens/infections/

This section has tons of articles about infections that teens can get, with information about how they're spread, signs and symptoms, when to go to the doctor, ...