When you inoculate children with a polio vaccine, you don't sleep well for two or three months.
Jonas SalkThere is a moment of conception and a moment of birth, but between them there is a long period of gestation.
Jonas SalkWhen you inoculate children with a polio vaccine, you don't sleep well for two or three months.
Jonas SalkThere is a moment of conception and a moment of birth, but between them there is a long period of gestation.
Jonas Salk