Which age group is considered at low risk for type 2 diabetes based on the provided information?

The age group that is generally considered at low risk for type 2 diabetes is the 6-year-old with a family history of diabetes. While family history can be a contributing factor to the risk of developing type 2 diabetes, young children, especially at the age of 6, are typically not classified as being at significant risk when compared to older age groups. Type 2 diabetes is more commonly diagnosed in older children, adolescents, and adults, particularly those with other risk factors such as obesity, sedentary lifestyle, or existing health conditions.

In contrast, the other individuals presented in the options are at higher risk due to various factors: the 19-year-old may still be in a low-risk category, but recovery from an illness like chickenpox doesn't typically correlate with diabetes risk. For the 76-year-old, advancing age and a history of cardiac disease indicate a higher likelihood of metabolic dysregulation. Lastly, the 28-year-old with a body mass index of 49 falls into the obesity category, which significantly raises the risk for type 2 diabetes. Therefore, the young child, despite having a family history, is more likely to be classified as at low risk comparatively.