- Prospective Cohort
- Reliable data from an insurance system, with a consistent database
- Lack of consideration of important confounding factors (co-morbidities)
- Possible information bias during the early stages of the epidemic when diagnostic tests were less common.
- Selection bias also possible because people in this private health system have a higher socio-economic status than those without insurance.
bibliovid.org and its content are bibliovid property.