What type of health insurance policies exclusively cover low frequency diseases?

Limited policies are designed to cover specific, often uncommon health issues, which aligns with the focus on low frequency diseases. These policies typically provide benefits for only certain types of care or conditions, such as catastrophic events or specific limited events, rather than a broad range of health care services. As such, they usually have lower premiums than comprehensive policies but also offer less extensive coverage.

In contrast, comprehensive policies offer broader coverage that includes various medical services and conditions, and major medical policies provide extensive health coverage, focusing on a wide array of health-related expenses rather than on limited low frequency diseases. High-risk policies target individuals with pre-existing conditions or lifestyle factors that lead to a higher chance of health issues but also encompass a wide range of diseases rather than being restricted to low frequency ones. Therefore, the emphasis of limited policies on low frequency diseases makes them the correct choice in this context.