MRC-5 is the name for a cell line that is used to make some vaccines, not an electively aborted baby boy.
Arthur Caplan is an expert on medical ethics and often writes about vaccines and combatting anti-vaccine misinformation.
Only anti-vaccine folks are calling MMR vaccine licensing into question because they rely on FOIA requests instead of doing any real research into vaccine safety.
Who should decide what counts as a medical exemption to getting vaccinated? Your chiropractor?