ACE2 and COVID-19: The fact that SARS-CoV-2 uses angiotensin-converting enzyme 2 (ACE2) as receptor, that ACE2 interacts with angiotensin receptors, that some COVID-19 patients with severe symptoms display a “cytokine storm” driven by macrophages and/or suffer neurological alterations, adds interest to the present work on the RAS system in microglia.