What’s the best pet insurance that’s affordable?

One of my newly adopted two kitties is very weak today wasn’t as active today I don't know I’m very worried and I wanna get pet insurance and take them to the vet when I first brought them in one of the kittens eye was halfway shutting but open when they wanted to open it very watery and sneezing and the other one was fine and now he has it too does anyone know what that is please help and I wanna get the best affordable pet insurance I’d really appreciate any advice at all

What’s the best pet insurance that’s affordable?
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