hello, i recently traveled to a new town and got my Son vaccinated as per his schedule for 1 year. he was given Biovac A for hepatitis A. My father took him for vaccination and they chose an injection site in lower arm. when I called them to check they said it was subqutaneous only. wanted to check if at all it makes a difference with injection site as I have never seen lower arm as injection site. will it affect the efficacy of vaccine. I am worried. it's a new city and a new clinic.