FABP4 and diabetes mellitus: While there is no known direct link between FABP4 and coronavirus infections, FABP4 is known to promote inflammation and metabolic dysfunction in several comorbidities that constitute a high-risk for coronavirus infection, including diabetes (Prentice et al, 2021), cardiovascular disease (Erbay et al, 2009), and airway disease (Ge et al, 2018; Shum et al, 2006).