1994c-692 20thcentury adverseeffects complications congenital congresses control cytomegalovirusinfections herpessimplex history humanexperimentation humanexperimentationinmedicine infection infectious measles-mumps-rubellavaccine mmrvaccine pertussisvaccine pertussisvaccines politicalaspects pregnancycomplications prevention research rubellavaccine rubellavaccines sideeffects syphilis toxoplasmosis vaccination wc340i59a1991 whoopingcough wq256m744t1993