According to the news most of the Tamiflu supplies in SEA are being grabbed up by the various governments to stockpile in case Avian Flu becomes a pandemic.
If you are worried about Avian Flu I would say do not as Avian Flu appears not to spread from person to person.
What I would worry about is the outbreak of Swine Flu in China, it appears to be more contagious and more deadly then Avian Flu.
(Since the Western Media has hopped on the Avian Flu bus you do not hear much about the Swine Flu unless you go to Chinese news sites like here: