1. One or more non-transitory computer-readable media storing computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform acts comprising: causing display of a conversation user interface along with a visual representation of a virtual assistant, the virtual assistant being configured with a persona; learning one or more characteristics about a medical-related user from a conversation with the medical-related user via the conversation user interface; receiving user input of the medical-related user during a later conversation, the user input comprising at least one of verbal input, keypad input, or touch input; parsing the user input to identify one or more concepts expressed therein; determining an intent of the medical-related user based at least in part on the one or more concepts; determining a response to the user input based at least in part on (i) a medical history for the medical-related user, (ii) the intent of the medical-related user, (iii) the one or more learned characteristics about the medical-related user, (iv) a disease management algorithm indicating information to mitigate or treat a disease or symptom, and (v) assumptions used to interpret the user input or previous user input; and representing the response in the conversation user interface as a message from the virtual assistant, the response including content to assist the medical-related user in managing a medical condition of the medical-related user.