<p>Hi, guys,</p>
<p>I'm working on a survey about Hepatitis B vaccination series requirement for incoming freshmen.</p>
<p>According to its official website, it says "Provide information of having received the three (3) Hepatitis B vaccine immunizations given over a period of 6 months".</p>
<p>I took three hep B vaccination shots when I was young, but I didn't take them all in a period of six months. So, I am wondering if I still need to re-take those three shots these days?</p>
<p>Also, what does that sentence "Do you have a Hepatitis B titer indicating exposure or immunity to Hepatitis B (core or surface antibody)?" mean? </p>
<p>Your help for answering my quetions are deeply appreciated! Thank you guys in advance!</p>