What’s the difference between patient 1 and patient 0?

Question

I know this is probably a stupid question, but if patient 0 is the first person to be infected, then why aren’t they just patient 1?

In: Other

Answer 1

Because 0 is always the origin point. They didn’t catch that disease from someone else. They got it from another animal or that it mutated inside them. Thus they are patient 0 and the next patient is patient 1.