In comparison with controls, platelets from hospitalized stable COVID-19 patients show enhanced levels of the platelet activation markers P-selectin and lysosomal-associated membrane protein 3 (LAMP-3), and significantly higher expression of the transmembrane integrins GPIIb/GPIIIa complex, GPIbα, GPIX, CD9, and CD40 [43]. This evidence concerns the gene GP9 and COVID-19.