NEET BIOLOGY

Detailed explanation-1: -An outbreak can be declared an epidemic when the disease spreads rapidly to many people.

Detailed explanation-2: -However, ‘outbreak’ is usually used when diseases happen in a more limited geographic area. If an outbreak of a diseases spreads quickly to more people than experts would expect and moves into a large geographic area, it is often then called an epidemic.

Detailed explanation-3: -Epidemiologists may use “cluster”, “outbreak”, and “epidemic” interchangeably. Typically, “cluster” is used to describe a group of cases linked by time or place, but with no identified common food or other source.

Detailed explanation-4: -A pandemic is a global disease outbreak. It differs from an outbreak or epidemic because it: affects a wider geographical area, often worldwide. infects a greater number of people than an epidemic.