What is the definition or description of: cold related illness?

Low temperatures: Cold related illness would describe the group of conditions that are more common during low temperature seasons. Although it is controversial about the exact reason, upper respiratory infections seem much more common as one example of a cold related illness.

Cold related: Cold related illnesses are due to exposure to cold temperatures with additional factors being wind speed & whether a person is wet. Frostbite or hypothermia are examples.