Dear Tenzin,
Welcome to the Wefugees Community and thank you for reaching out to us.
For some general information on studying in Germany (incl. visa requirements, the procedure etc.) you may want to check the "Make it in Germany" website by the German government. On this website, you find some universities offering a Public Health Master program.
If you have some specific questions, please don't hesitate to get back to us.
All the best,
Meike