[Immunizing and immunomodulating activity of a wild epidemic parotitis virus at a parotitis infection focus].

The immune status of 18 children previously vaccinated or not with live parotitis vaccine and living in a focus of parotitis was tested over time. Specific antibodies were found in the blood sera or nasal secretion of 88.9% children by follow-up days 10-20, and memory antigen-reactive cells were forming in 55.6%. Functional temporary T-immunodeficiency was observed at the same period in 66.7% children. Although there were no cases of clinically apparent epidemic parotitis, immunologic studies confirmed the circulation of wild type virus. Immunologic studies detected 2 cases of inapparent course of epidemic parotitis.