That's why a vitamin C deficiency can mean a reduced resistance against certain pathogens and a higher supply can enhance several immune system parameters. (ora.organic)
They respond quickly but attack certain pathogens less specifically. (sciencedaily.com)
The FDA allows its use as an antimicrobial agent, a flavoring agent and adjuvant, a pH control agent, and as an inhibitor of the growth of certain pathogens. (treehugger.com)