Domestic cats don't need vaccinations because they have stronger immune systems than purebred cats and are less prone to illness. Since domestic cats are usually kept indoors, they are unlikely to come into contact with infectious diseases. However, it's important to deworm them regularly, and if they frequently go outside, it's best to get them vaccinated for added protection. 
Stray cats also need vaccinations. Although their harsh living conditions have fostered strong immunity, they are still relatively susceptible to infectious diseases. Therefore, regular vaccination is essential. Generally, in the first year, cats should receive three doses of a triple vaccine and one rabies vaccine, with each dose approximately 21 days apart. After that, annual vaccinations are sufficient.
If it's your cat's first vaccination, they need to receive a combination vaccine against feline infectious diseases 21 days apart, for a total of three injections. When your cat is four months old, they can receive their first year's rabies vaccine. Annually vaccinated cats need an 11-month interval between their last vaccination and a combination vaccine and a rabies vaccine. Before vaccination, ensure your cat is in perfect health; vaccination is contraindicated if your cat has any illnesses.
