Protective Activity of a Human Respiratory Syncytial Virus Immune Globulin Prepared from Donors Screened by Microneutralization Assay

George R. Siber, Jeanne Leszczynski, Victor Pena-Cruz,* Carley Ferren-Gardner, Roger Anderson, Val G. Hemming, Edward E. Walsh, Jane Burns, Kenneth McIntosh, Rene Gonin, and Larry J. Anderson Massachusetts Public Health Biologic Laboratories, Divisions of Infectious Diseases and ofBiostatistics and Epidemiology, Dana-Farber Cancer Institute, and Division of Infectious Diseases, Children's Hospital, Boston, Massachusetts; Department of Pediatrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland; Department of Medicine, University of Rochester, New York; Department of Pediatrics, UCSD School of Medicine, La Jolla, California; Division of Viral and Rickettsial Diseases, Centers for Disease Control, Atlanta, Georgia