Swine Flu: Medical Treatments Bob Spink To ask the Secretary of State for Health what proportion of those diagnosed with swine influenza have been treated with (a) Tamiflu and (b) Relenza. Gillian Merron Health Protection Agency records, to date, suggest that 99 per cent. of confirmed H1N1 cases are offered Tamiflu (Oseltamivir), and approximately 1 per cent. are offered Relenza (Zanamivir).