When sleeping, do obese people generally do more mouth-breathing? (IIRC, obesity is a major risk factor for sleep apnea.) If so, it might take some legwork to

When sleeping, do obese people generally do more mouth-breathing? (IIRC, obesity is a major risk factor for sleep apnea.) If so, it might take some legwork to untangle those two factors (mouth breathing vs other obesity issues) to explain covid's disproportionate impact on obese people.