This doesn't deal with Tamiflu, per se, but my wife is a hospital pharmacist. She called me yesterday from work to say she wasn't feeling well (I had been sick for three days with some virulent GI problem so I suggested she head home). Well, she didn't until she thought she couldn't make it so I suggested she see a doctor there at the hospital. Long story short, she has both A and B strains of influenza and had taken the vaccine. They repeated the swab after the first positive because she had taken the vaccine. So whether I had influenza or not, I don't know for certain, but she did. Which, of course, is in consonance with the above post on vaccines not working. Viruses mutate, or those who decided which flu viruses to choose as the likely pathogens in a given year's vaccine make imprecise choices.