los SARS coronavirus (SARS-CoV y SARS-CoV-2) y MERS coronavirus (MERS-CoV). El MERS-CoV (coronavirus del Síndrome Respiratorio del Medio Oriente), el SARS-CoV (coronavirus del síndrome respiratorio agudo severo), y el SARS-CoV-2, (coronavirus que causa la enfermedad por coronavirus del 2019, o COVID-19) son miembros de la familia de los β-CoVs. 1-8 INTRODUCCIÓN L os coronavirus son virus ARN monocatenarios positivos pertenecientes a la familia Coronaviridae. Las infecciones humanas CoV son causadas por α-y β-CoVs. Se han descrito siete coronavirus con potencial de infección del ser humano, dos de ellos son graves: Revista ADM Consideraciones sobre el diagnóstico de COVID-19 y el papel del diagnóstico salival. Considerations on the diagnosis of COVID-19 and the role of the salival diagnosis.

Introduction: for decades, instruments aimed at changing and improving the patient's condition before surgery have been created in the medical practice. Objective: to improve the preoperative evaluation of patients included in the "Miracle Mission" cooperation program. Methods: a retrospective and descriptive study was conducted at the hotel-hospital located in Pasacaballos, Cienfuegos, in which 7 956 patients from 12 Latin American and Caribbean countries were evaluated from September, 2005 to April, 2007. A customized four-phased methodology was submitted to evaluate preoperatively. The center's database provided the following pieces of information: physical status, causes of surgery postponement, causes of surgery cancellation by specialty and eye disease of the patient. Results: type II-classified patients predominated (55.8 %, according to criteria of the US Society of Anesthesiology). The main causes of surgery postponement were ocular secretion (22.6 % of the postponed cases), ocular hypertension (19.5 %), aspirin taking (17.2 %) and decompensate diabetes mellitus (12.4 %). Eight hundred and ninety nine patients and thirty seven patients were considered noneligible for surgery due to ophthalmological and internal medicine reasons respectively. Conclusions: The submitted methodology contributes to improving the preoperative medical care for patients included in the "Miracle Mission" cooperation program in Cienfuegos province. The achieved results suggested that it can be useful in limited financial resource settings.