An alternative chemical has been discovered by a research team from Florida that appears to be more powerful and more effective than diethyl-3-methylbenzamide.

More known as DEET, the chemical has been in use since the 1950s as an insect repellent. DEET normally provides up to four hours of protection

Following the outbreak of the deadly yellow fever in Paraguay, more than 1.27 million residents have now been vaccinated, the United Nations World Health Organization (WHO) has reported. All of Paraguay's 18 departments have received vaccines, with as much as 83 percent of the population in Asuncion, the capital.

According to the last update issued by WHO on Friday, the number of confirmed cases across Paraguay has risen by six to 22. So far the disease has taken the toll of six lives while another 12 suspected cases are under investigation by health authorities

The United Nations World Health Organization (WHO) has organized the supply of two million doses of yellow fever vaccine to Paraguay as health authorities in the South American country battle a deadly outbreak of the viral disease.

The vaccine doses were obtained from the WHO's International Coordinating Group on Provision of Vaccines, the agency said in an update released today. Brazil has sent 850,000 doses and Peru has dispatched 144,000, adding to the 300,000 that Paraguay already has on reserve

The World Health Organization (WHO) said Wednesday that seven cases of jungle yellow fever have been confirmed in Paraguay while four others may have also been infected from the recent outbreak in 34 years.

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

Brazilians are lining up at health centers and medical facilities in the wake of a yellow fever scare. The ailment, an acute viral disease, claimed a third victim from the southern city of Maringa.

According to municipal health officers, 46-year old Almir Rodrigues da Cunha died Wednesday. He may have acquired the ailment after a visit to Caldas Novas, a town in Goias state, where he stayed for the Christmas break