Florida health officials are investigating two more mysterious cases of Zika infection that do not appear to be related to travel, bringing the total to four.
No new country or territory had reported mosquito-borne Zika virus transmission in the week leading up 20 July 2016, according to the World Health Organization. The FDA also recommended that adjacent and nearby counties adhere to these requirements as well.
Visitors to South Florida in the last month are being urged to defer donations as well.
The U.S. FDA has temporarily suspended blood donations in two Florida counties due to fears over Zika virus.
"The possibility of local transmission in Miami-Dade and Broward counties makes it all the more important that women who are pregnant, or who might potentially become pregnant, take all precautions", Murthy added, chiefly avoiding mosquitoes.
Officials said this will remain in place until the blood establishments implements testing to find if Zika is present in the donated blood in both counties.
Messages left Thursday for officials at the Florida Department of Health were not immediately returned. These mosquitoes have not been detected in Sacramento county, according to the Sacramento-Yolo Mosquito and Vector Control District. The primary concern in Oklahoma is West Nile virus which is spread by the Culex mosquito. Residents can help by draining any standing water outside their homes, covering areas where standing water is likely to accumulate, and using mosquito repellent outdoors.
"Data linking Zika virus infection to fetal death have been reported in only a handful of cases", wrote a team led by Dr. Annemiek van der Eijk, of Erasmus Medical Center in Rotterdam, the Netherlands.
The Oklahoma Department of Health confirms that the mosquito connected with the Zika virus has been found in southwest Oklahoma. Additionally, anyone who develops a high fever, rash or joint pain after returning from countries affected by any of these conditions should see a doctor as soon as possible, he says.
For months, models have predicted Florida and Texas as the most at-risk locations for local Zika outbreaks, a point echoed by officials at the Centers for Disease Control and Prevention.