Final answer:
Older men within the demographic of severe obesity are at the highest risk of mortality from COVID-19 due to age-related vulnerability and the increased likelihood of obesity-related illnesses.
Step-by-step explanation:
The demographic group with severe obesity that is at the highest risk of mortality from COVID-19 is older men. Obesity is a significant risk factor for numerous negative health outcomes, including cardiovascular disease, Type 2 diabetes, and various forms of cancer. When addressing severe obesity, it is important to understand that morbid obesity is classified when a person has a Body Mass Index (BMI) of 40 or more.
Regarding COVID-19, studies have shown that older adults with co-morbidities such as obesity are at a higher risk of severe complications and mortality. The demographic of older men with severe obesity stands out due to the combination of age-related vulnerability and the presence of obesity-related illnesses, which can exacerbate the impact of respiratory infections like COVID-19.