recommended recommended in 1997 side effects CDC - Morbidity and Mortality Weekly Report recommended in 1997 recommended recommended in 1997 http://www.cdc.gov/mmwr/preview/mmwrhtml/00048610.htm http://www.cdc.gov/mmwr/preview/mmwrhtml/00048610.htm recommended acellular vaccine acellular vaccine More severe problems March 28, 1997 / 46(RR-7);1-25 http://www.cdc.gov/mmwr/preview/mmwrhtml/00048610.htm http://www.cdc.gov/mmwr/preview/mmwrhtml/00048610.htm