Deseases very rarely go world-wide pandemic with a high fatality rate. The 1918 flu was an exception because of the situations in the Western Front of the Great War.
Antibiotics do not work on a virus. The Flu is a virus, not a bacterial infection. Tamiflu is an anti-viral drug.
The issue with anti-biotics is that it also cleans out useful flora and fauna in your system. So don't go overboard with anti-biotics.
Placebos are useful for boosting your immune response.
If you where extremely worried, you could get a normal Flu shot (you don't want to have two flus at once!).
Also, avoid chicken-human organ transplants.
