Figure 3. Theoretical model of a patient with multimorbidity with COVID-19. Blue balloons represent chronic diseases; green balloons, COVID-19 complications; yellow rectangles, treatment for chronic diseases; and red rectangles, new therapy initiated on admission. Gray lines represent usual treatment based on the disease; blue lines, potential disease interactions; red lines, potential interactions between the proposed treatments; and black lines, potential interactions between the proposed treatment for two different diseases. COPD: chronic obstructive pulmonary disease; HTN: Hypertension; HF: heart failure; AKI: Acute Kidney Injury; SSRI: selective serotonin reuptake inhibitor; ICU: intensive care unit. Adapted from.^37,38.