Abstract
Summary
The mumps plaque neutralization assay procedure was found to be a sensitive indicator of low levels of mumps antibodies. Undiluted serum can be studied for the presence of mumps antibodies and there is no problem of nonspecific inhibition. The levels of antibody 1 year after natural mumps are more stable by the PN method than by HAI or CF tests. This assay procedure is valuable in studying sera where low levels of antibody may be present, as after remote natural disease, or vaccination with attenuated mumps strains.
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