Which one is smaller? Virus or bacteria?
Virus is smaller.
What will happen when viruses reach your stomach?
They are usually destroyed by stomach acids.
What do you need to see virus and bacteria?
We need an electron microscope.
What is the system that fights against virus and bacteria called?
It is called immune system.
What disease does polio virus cause?
It paralyzes people.
Why can't virus infect top layer of our skin?
Because it is made of dead cells.
What disease does an influenza virus cause?
It causes flu.