Craig,
You may find the information here:
http://www.forbes.com/2009/07/22/glaxo-swine-flu-markets-equity-pharmaceutical.html
Mr Witty must be referring to this: "To assert, right now, that this (swine flu) will cause a massive rise in sales, well, that class of response is erroneous and lacks understanding." which is reported at
http://www.news.com.au/perthnow/story/0,21498,25397672-951,00.html?from=public_rss