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Live attenuated virus vaccines: Immunoglobulin administration may impair for a period of at least 6 weeks and up to 3 months the efficacy of live attenuated virus vaccines such as measles, rubella, mumps and varicella.
Interference with serological testing: After injection of immunoglobulin the transitory rise of the various passively transferred antibodies in the patients' blood may result in misleading positive results in serological testing.
