[BCG-polysaccharides-nucleic acid and its effect in the prophylactic treatment of the common cold]

The polysaccharides-nucleic acid fraction extracted from BCG was found out to be a good adjuvant. Through the activation and protective of the suppressed body immune system, particularly the macrophages and T cells, it gave good protection to the Sendai virus airway infection of C57BL mice, and clinical effect on the common cold susceptible.