Methods
A literature search of Monoclonal antibody and blood plasma ABO blood group based therapy against COVID-19 was carried out for English language review articles, using the electronic database of PubMed and Google Scholars. The following search terms were input: (Monoclonal antibody, COVID-19, Spiked protein, ACE2, ABO blood group) in (Title/Abstract). The authors investigated all relevant studies for quality and publication date and notably, a list of references was added manually.