Swiss drug maker Novartis' vaccine and diagnostcs chief Andrin Oswald (L) and former World Health Organization (WHO) flu chief, now Novartis vaccine development specialist Klaus Stoehr wait before meeting with United Nations Secretary-General Ban Ki-moon and WHO Director-General Margaret Chan on May 19, 2009 at WHO headquarters in Geneva. Novartis said on May 19 it has received samples of the swine flu A(H1N1) virus and is awaiting the WHO's go-ahead to begin producing a vaccine.