Moving to an area of specialty should be done in your second or third year, if possible. If you wait much longer, it becomes more difficult, as clients will expect you to possess certain industry-specific knowledge and look to you for expert advice and counsel.
One of the key things to ask yourself is, "What am I passionate about?" Is it the science, consumer health education, medical and regulatory issues, or understanding and communicating the data? Also ask yourself, "Do ...