Having a cat has no effect on your health.
Cats have no effect on human body. As long as it is fed scientifically, cats will not do harm to human body. Therefore, it is best to regularly deworm cats when raising cats to avoid fleas.
The cat needs vaccination when it is three months old. Generally, cats will get a shot of rabies vaccine in the pet hospital, which can prevent cats from contracting infectious diseases and rabies, so it won't be anything if they are accidentally scratched by cats at home.
Toxoplasma gondii in cats affects the fetus of pregnant women, but the probability of infection is generally low. It is only possible to get infected by shoveling cat feces and eating them directly without washing hands, or eating cat feces directly. So as long as you pay attention to cleaning up Toxoplasma gondii, you won't be infected.