REN and COVID-19: Information about the ethnicity of the patients affected by COVID-19 will also be important to understand if African and Afro-American patients, who usually have low plasma renin levels, will be really less affected than other populations; this concept seems to be reinforced by data on COVID-19 available from World Health Organization at the moment and from our hundreds of cases of COVID-19 patients in the Abruzzo region, Italy (unpublished observations), although such observation may be biased by several temporal and season disease development-related issues.