What Causes a ‘Pandemic’ to Spread So Quickly?

A pandemic is like a fire that starts with just one spark. If the virus can jump from person to person easily, and people don’t know they’re sick, it spreads fast, like wildfire!

Viruses are tiny and sneaky. They can live on surfaces, in the air, or even in droplets when someone coughs or talks. If many people catch the virus at once, it's like a big chain reaction: one person infects ten, those ten infect a hundred, and so on, until almost everyone is affected.