COVID-19 is a virus.
A virus causes illness that can spread easily from one person to another person.
COVID-19 can make you very sick.
COVID-19 spreads quickly.
COVID-19 is a pandemic.
A pandemic is when a virus spreads quickly to lots of countries around the world.
A pandemic is when a virus spreads quickly to lots of countries around the world.
We also call COVID-19 coronavirus.