Cat Health Threats
Cat Health threats fall into two major categories. Bodily harm from fighting, accidents, or cruel humans is one category. Common illnesses, parasites, and known system weaknesses is the other.
An indoor cat has a huge advantage against the bodily harm threats. A cat that lives outdoors (or ventures out often) is subject to many physical threats. It does depend on the environment, busy suburban areas and rural areas are probably the worst. Quiet neighborhoods, with little traffic and few predators have much less risk.
The same factors have a bearing on the second category too. If a cat is not exposed to other animals or parasites, and receives proper feeding and care the risk for illness and disease is greatly reduced. There still are some natural causes, like kidney problems, that are unavoidable.
Cats are tough