Scientists find why cats got sick. They find a new virus. This virus made cats very sick.
Cats got a sickness called FIP. FIP can spread fast. It can kill cats.
This is a big finding. It helps us know about the sickness. People were worried.
More cats got FIP last year. Sadly, many cats died. Doctors worked hard.
A team looked at the virus. They saw it changed a lot. It became very harmful.
This study is important. It helps make better tests. It can help sick cats.