Lectins Aleuria Aurantia Lectin (AAL), Erythrina cristagalli lectin (ECL), Maackia Amurensis Lectin (MAL), Peanut Agglutinin (PNA), Ricinus Communis Agglutinin (RCA), Sambucus Nigra Agglutinin (SNA) showed cardiomyocyte membranous staining in both COVID-19(−) and COVID-19(+) (supplementary Fig. S1). This evidence concerns the gene CCL21 and COVID-19.