China's official H1N1 flu death toll has soared to 325, with more than a third of the fatalities reported in the first week of this month. The health ministry said the total number of A (H1N1) influenza cases in the country surpassed 100,000 as of December 6. Of the total deaths, 125 of them were reported in the week from November 30 to December 6, signaling that the death rate was picking up pace. A ministry official said cold weather was to blame for the rapid rise in the number of H1N1 flu fatalities. China has so far vaccinated more than 31 million people against the virus and aims to vaccinate up to 65 million people by the end of the year.