A definite conclusion would require specific prospective clinical trials, which are still running: https://clinicaltrials.gov/ct2/show/NCT04312009 is a multi-centered double blind trial with the aim to test the role of ARB in patients with COVID-19 and https://clinicaltrials.gov/ct2/show/NCT04331574 is another trial evaluating the outcome of patients with COVID-19 in therapy with either ACEI and ARBS.