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Prior to 2006, M-M-R ®II (measles, mumps, and rubella virus vaccine live) was manufactured using human serum albumin (HSA) and each dose of the vaccine contained a relatively small amount (≤0.3mg) of HSA. Because of specific regulatory requirements and limited suppliers of HSA acceptable for human use, there was a need to replace HSA with recombinant human albumin (rHA) to mitigate any...