Background: The COVID-19 is a pandemic viral infection with a high morbidity rate. leading to many worldwide deaths since the end of 2019. The RBD (Receptor Binding Domain) of SARS-CoV-2 through its spike utilizes several host molecules to enter host cells. One of the most important ones is the angiotensin-converting enzyme 2 (ACE2). https://jalyttlers.shop/product-category/porcelain/