instead, the better factors to consider are age, weight[0], comorbidities, household size, job duties (e.g., public-facing or not), and sociability. these also tend to be more stable and consistent, meaning you don't need to reconsider your personal mitigations very often. that'd indicate who generally needs personal mitigations and who doesn't (exceptions like a holiday family gathering would still need to be handled exceptionally).

[0]: i'd suggest 'overall health' is the more accurate (if more vague) factor, but weight tends to inversely correlate with general health (overweight ==> weaker immune system, less efficient pulmonary/cardiovascular system, lower muscle tone, more visceral fat, higher diabetes risk, etc.).