The United Nations' agency statement says that seven cases came from the San Pedro region, while the other four were discovered in the town of Lorenzo, near Paraguay's capital.
Public Health Minister of Paraguay Oscar Martinez said that the first deaths from the outbreak of the mosquito-borne disease since early this month when five cases were discovered in a remote farm in San Pedro. However, no one died from the victims.
Confirmation of the four other suspected cases is pending, the statement added.
Public health containment measures in areas affected that include mass vaccination, vector control and heightened surveillance has been increased by the Ministry of Health of Paraguay.
Shortage on yellow fever vaccines was address by mobilizing vaccines from other countries of the region.
A request of 2 million doses of vaccines from the WHO ICG (International Coordinating Group on Vaccine Provision) was also asked by the Paraguayan government.
Yellow fever is a viral disease that can be transmitted through the infected mosquitoes' bite. One will suffer from an influenza-like syndrome to severe hepatitis and hemorrhagic fever once infected.
According to WHO, around 30,000 people worldwide die yearly from the disease.
