I applied online. The process took 3 months. I interviewed at Harvard University (Cambridge, MA)
Interview
The interview was simple for my department. you just do a skype interview. The professor was very friendly and they just wanted to get to know you better. He asked you questions about your research experiences, why you want to become a PhD student, and why the discipline you've chosen.
I applied through college or university. The process took 3 months. I interviewed at Harvard University (Boston, MA) in Jan 2019
Interview
Got invited for a weekend with other prospective students. After a few presentations and breakfast, we had the chance to meet with current professors. After that, we were treated with dinner drinks with current students, as well as a brunch with professors and students.
Interview questions [1]
Question 1
Why are choosing to pursue a PhD in Biostatistics? Tell me about your past research experiences. What biostatistics research are you interested in?
I applied online. The process took 3+ months. I interviewed at Harvard University (Boston, MA) in Dec 2012
Interview
Application through the departments. Of course you will need the GRE and good academic preparation from your undergraduate school. Letters of recommendation and some experience in research will take you far. Once submitted, each department will review the applicants and they are invited for interviews.