Indoor-only pets still need to stay up to date with core vaccines and yearly exams.
An unintended, though common, the problem we see with indoor-only pets is that they accidentally get out. And if they are unvaccinated, it means they can be exposed to disease with no protection at all.
In addition, it is possible for owners or other pets to expose indoor-only pets to disease. Some diseases are in the environment and can be brought in by owners or other pets.
Other diseases are so dangerous to people, such as rabies, that it is mandated by law to have all animals vaccinated for this disease.