Here are the list of available MOOC on primary care topics:
https://www.edx.org/course/to-prescribe-or-not-to-prescribe-antibiotics-and-outpatient-infections
https://www.coursera.org/learn/diabetes-essential-facts
https://www.coursera.org/learn/infarction
https://www.classcentral.com/course/healthforall-837