Host molecular targets – not specifically engaged by vaccine antigens

The term "Host molecular targets – not specifically engaged by vaccine antigens" is a categorical designation used in clinical and regulatory landscapes, such as those maintained by the World Health Organization (WHO), rather than a specific molecular entity (WHO, 2021). It refers to a broad group of host-side proteins, including receptors like ACE2 or TMPRSS2 and various inflammatory cytokines, that are involved in disease pathogenesis but are not the primary focus of a vaccine's antigen-induced immune response. This classification is typically used to distinguish between traditional vaccines, which target viral proteins to elicit adaptive immunity, and host-directed therapies that modulate the body's own biological pathways to prevent or treat infection. Because this entry represents a functional grouping of diverse molecules, it does not possess a single molecular classification, biological function, or specific set of interacting drugs. For biotech analysts, this term should be understood as a placeholder for various host-directed therapeutic strategies that may be used in conjunction with or as alternatives to vaccination.

Other names

Host-directed targetsNon-antigenic host factors

Not applicable as this is a categorical classification rather than a specific molecule.