4.1.1.1  Hypothesis: Plasma from patients recovered from COVID-19 contain antibodies against 2019-nCoV
A look at the history of viral outbreaks offers convalescent plasma as the only remedy to avoid further fatalities. The most recent examples include the pandemic of influenza A H1N1 (H1N1pdm09) in virus infection 2009, the Western African Ebola virus epidemic in 2014, and the outbreak of MERS-CoV in 2015 [9]. Meta-analysis studies have shown a reduced risk of mortality in patients with SARS-CoV and influenza receiving convalescent plasma [10].