Abstract Background COVID-19 is a respiratory disease caused by a novel coronavirus (SARS-CoV-2) and causes substantial morbidity and mortality. At the time this clinical trial was planned. there were no available vaccine or therapeutic agents with proven efficacy. but the severity of the condition prompted the use of several pharmacological and non-pharmacological interventions. https://poolsproductscanadas.shop/product-category/jandy-aqualink-z4-parts/