definiens: shall mean a single molecule comprising :( a ) an eﬀector domain consisting of the fragment crystallizable ( Fc ) region ( wild - type or variant ), [ * * * ] of ahuman antibody ( ) ; ( b ) one or more targeting domains, each consisting of a small molecule compound or peptide that binds to asurface target of a particular viral pathogen or host cel l ( ) ; and ( c ) one or more linkers to connect one or more Targeting Dom ains to the Eﬀector Domain, each linkercomprising a ﬂexible chain of atoms that may include one or more amino acids, and that is covalently attached at a ﬁrst endto the Eﬀector Domain and covalently attached at a second e nd to a Targeting Domain, and which may be branched an dcovalently attached at additional ends to additional Tar geting Domains ( ) ; provided, however, that ( i ) [ * * * ] and ( ii ) [ * * * ]