Abstract
In this issue of Folia Biologica, Viza and colleagues suggest transfer factor as a potential option for managing the COVID-19 pandemic (Viza et al., 2020). Transfer factor, an activity identified in activated immune cells, which has modulatory effects on cell-mediated immunity, belongs to small regulatory proteins in a broader sense.
These proteins have been found in many animal species, yet are mostly uncharacterized at the genomic level.