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

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

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

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