Answer:Biology and genetics. Gender and age
Individual behavior. Examples: alcohol use, injection drug use (needles), unprotected sex, and smoking.
Social environment. ...
Physical environment. ...
Health services.
Explanation:
Mental disorders are recognized by how the person feels, behaves, and thinks.
Infectious diseases are transmitted from person to person by direct or indirect contact. Old people, pregnant people, and infants can get sick easier. Certain types of viruses, bacteria, parasites, and fungi can all cause infectious disease
