[Studies of the ph dependency of the rubella HAI test (author's transl)].

To establish a possible dependency of the rubella hemagglutination inhibition (HAI) test upon the pH value, 4 pooled sera were examined for their content of rubella-specific antibody in the HAI test at varying pH (6.0;6.5;7.0;7.5;8.0). The results obtained for the range of pH 6.0--8.0 speak against a pH dependency of the rubella HAI test.