ACE2 and cancer: In fact, although the nasal goblet and ciliated cells represent the main site of expression of ACE2 and TMPRSS2 receptors, both required for SARS-CoV-2 infection of host cancer cells [13], a recent study by Lukassen et al. [14] confirm that SARS-CoV-2 receptors are expressed also in bronchial secretory epithelial cells.