The validity period of the free visit visa on arrival seems to change irregularly - 30 days when new visa rules started 29 July 2008, up to 60 days sometime in August, back to 30 days in January 2009. Add a comment to the Dubai visit visa period topic.
By far the most common degree level within public health, an MPH degree program is a graduate-level degree that many people are deciding to seek nowadays. With an MPH degree, you can have a very strong career within the public health field, working with many professionals, companies, and government entities.
I do NOT have an MPH, but did get an MBA. I can tell you that an MPH after your MD/DO means whatever you want it to mean.. The vast majority of MD/MPH doctors are physicians who have a specific interest in public health, or how we can treat not just the ills of the individual but of society as a whole.