"With regard to deaths, unfortunately, they do occur. As of Friday, we had data on 15 fatalities. Over the weekend at least five other people died [from the flu]," Tatiana Zasukhina said.
Swine flu is common among pigs. Transmission of the virus from animals to humans is not common and does not always lead to human flu, often resulting instead in the production of antibodies only. However, when it does develop in humans, it carries a higher risk of fatality than the common flu.