Home Doctor giving injection to baby boy (2-5 months). CREDIT: Science Photo Library / IAN HOOTON Doctor giving injection to baby boy (2-5 months). CREDIT: Science Photo Library / IAN HOOTON

Doctor giving injection to baby boy (2-5 months). CREDIT: Science Photo Library / IAN HOOTON

Childhood injection. Doctor giving a 5-month-old boy an injection, while he sits in his father’s lap.

Stock baby vaccine. Doctor giving baby injection in doctor’s office. CREDIT: Digital Vision/Getty Images