Final answer:
Infectious diseases, like HIV, Hepatitis B, and Hepatitis C, are caused by pathogens, can be transmitted between people, and can be prevented and treated.
Step-by-step explanation:
Infectious diseases, such as the human immunodeficiency virus (HIV), Hepatitis B Virus, and Hepatitis C virus, are caused by pathogens that infect the body and can be transmitted from person to person. HIV is a retrovirus that attacks the immune system and can lead to acquired immunodeficiency syndrome (AIDS). Hepatitis B and C viruses infect the liver and can lead to long-term liver damage. These diseases can be prevented and treated through various measures, such as practicing safe sex, using sterile needles, and getting vaccinated.