According to details released Friday by the US Centers for Disease Control (CDC), the recent case of a child infected with swine-origin H3N2 virus in West Virginia has taken the number of reports about human infections with the virus to twelve.

Going by the information shared by the CDC, the reports of the human infections with swine H3N2 flu have come from five states - Indiana, Iowa, Maine, Pennsylvania, and West Virginia. Eleven of the cases were children; and one patient was an adult male, who seemingly contacted the virus from exposure at his job.

Further adding that half of all the reported cases had not been exposed to swine, the CDC said that all the patients – three of whomn had to be admitted to hospital - have recovered fully.

CDC also said that there probably are more cases of the swine H3N2 flu – the new virus which was first spotted in July – than have been reported thus far, because there seemingly are some cases which the country's flu surveillance systems failed to identify.

With no other country having thus far reported cases of human infections with the swine H3N2 virus, Dr Joe Bresee – chief of the influenza epidemiology team in the CDC's Influenza unit – said that, on the basis of the investigations of the outbreaks, it is “not clear yet that these viruses have acquired the ability to circulate in humans in a sustained way.”