Dr. Norbert Bischofberger (born 10 January 1956 in Mellau, Austria) is an Austrian scientist and one of the inventors of the antiviral drug Tamiflu generically known as oseltamivir, which is, as of 2009, the only oral medication on the market to treat influenza A and B as well as the 2009 Pandemic H1N1 (swine flu), the spread of which caused an ongoing pandemic in 2009. Bischofberger is currently the President & Chief Executive Officer of Kronos Bio, and previously was the Executive Vice President, Research and Development and Chief Scientific Officer at Gilead Sciences, a biopharmaceutical company specializing in antivirals.