In a national online survey , parents ( N = @ ) of infants < @ months old were randomly assigned to receive @ of @ MMR vaccine messages : ( @ ) the Centers for Disease Control and Prevention Vaccine Information Statement ( VIS ) , ( @ ) VIS and information emphasizing the MMR vaccine 's benefits to the child , ( @ ) VIS and information emphasizing societal benefits , or ( @ ) VIS and information emphasizing benefits both to the child and society .