I volunteer with a group called Viet Nam Medical Assistance Program (VNMAP). A public health organization focused on increasing healthcare awareness and access for Vietnamese people locally and globally. We have an upcoming event on screening and educating the public about Hep B. Here is the online sign-up if you are interested in helping out. NOTE: you do not need to be Vietnamese or pre-health, so feel free to bring friends! Please let me know if you have any questions.
P.S. I just picked a tentative time, since there are rotations.