Intellectual disability is second only to old age as a risk factor for COVID-19 death, and obesity is linked to coronavirus-related hospitalization and death, two new studies find.Deadlier than heart, kidney, lung diseaseThe first study, led by researchers from Jefferson Health in Philadelphia and published late last week as a commentary in the New England Journal of Medicine Catalyst, involved analyzing the medical records of 558,672 US COVID-19 patients from January 2019 to November 2020.Patients with intellectual disabilities had higher rates of coronavirus infection than those without those limitations (3.1% vs 0.9%).