ALB and severe acute respiratory syndrome: These two compounds, which carry net negative charges, may interact with the positively charge residues in the spike protein of the pseudotyped MERS-CoV, in a similar way as they inhibited infection of HIV [12–14]and other enveloped viruses, such as inhibition of SARS-CoV infection by ADS-J1 [16] and inhibition of human papilloma virus (HPV) infection by HP-HSA [17].