Will there be a global flu epidemic?

“We do not know whether this swine flu virus or some other influenza virus will lead to the next pandemic,” says, Richard Besser, acting director of the CDC, “However, scientists around the world continue to monitor the virus and take its threat seriously.” UPDATE: the WHO raised its alert level from Phase IV to V, with recent infection rates in Japan, the WHO has been hinting that they will need to upgrade to pandemic Phase VI.