The invention provides methods for decreasing or inhibiting herpesviridae infection or pathogenesis of a cell in vitro, ex vivo or in vivo, a symptom or pathology associated with a herpesviridae infection or pathogenesis in vitro, ex vivo or in vivo, or an adverse side effect of herpesviridae infection or pathogenesis in vitro, ex vivo or in vivo. Each pump, under the control of the processor system, draws an associated stock solution from a stock solution source, and pumps the drawn stock solution out through an outlet. The treatment with the GCIB may selectively remove an undesirable specie andor introduce a desirable specie to the host region.