Describe the impact of famine?

Describe the impact of famine?
Or
What is a famine? How are people affected by a famine?

A famine is characterised by widespread deaths due to starvation and epidemics caused by forced use of contaminated water or decaying food and loss of body resistance due to weakening from starvation.
This occurs due to a severe shortage of food resulting from crop failure or other calamity, which increases the price of food dramatically, making it not affordable to, the weaker sections of the population.