An epidemiologist is a trained professional who seeks to discover the reasons or causes for public health problems and diseases. He or she will focus on prevention and seek to educate the public on research findings. The epidemiologist
typically studies one or more of the following:
maternal health, infectious disease, sex-related health issues, and
•triage procedures
•stress-related behavior
•substance abuse
• pediatrics

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

cutt.ly/XzW3SUN

substance abuse

Explanation:

i'm not sure, but can you answer my most recent question?

one time i was looking at my neighbors screen door to see if the door was open i was squinting like a fool for 10 minutes before realizing he was starring back i then died from embarrassment and am now typing this from the ghost world