Alcoholism used to be broken into categories - alcohol dependence and alcohol abuse.
Is it still classified that way, or has it changed?
From a medical perspective, it's when a person drinks large amounts and has difficulty cutting down.
What do you call people who drink but do it reasonably and safely?
A social drinker, but alcohol use affects all parts of the body.
What parts are affected the most?
Alcohol particularly affects the brain, heart, liver, pancreas, and immune system.
How does it affect the immune system?