How long should I wait before calling/emailing an interviewer again?...

<p>I received an email from a Duke interviewer last Sunday and replied, and he still hasn't gotten back to me. Is this normal?<br>
I also emailed my Princeton interviewer two days ago and haven't received a response yet.</p>

<p>Should I call them again or give them more time?</p>

<p>Give more time. At least a week.</p>