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Experimental Zika vaccine to begin human testing

FILE - In this Feb. 11, 2016 file photo of aedes aegypti mosquitoes are seen in a mosquito cage at a laboratory in Cucuta, Colombia. An experimental vaccine for the Zika virus is due to begin human testing in coming weeks, after getting the green light from U.S. health officials. Inovio Pharmaceuticals said Monday, June 20, 2016, that it received clearance from the Food and Drug Administration to begin early-stage safety tests of its DNA-based vaccine against the mosquito-borne virus.(AP Photo/Ricardo Mazalan, File)
FILE - In this Feb. 11, 2016 file photo of aedes aegypti mosquitoes are seen in a mosquito cage at a laboratory in Cucuta, Colombia. An experimental vaccine for the Zika virus is due to begin human testing in coming weeks, after getting the green light from U.S. health officials. Inovio Pharmaceuticals said Monday, June 20, 2016, that it received clearance from the Food and Drug Administration to begin early-stage safety tests of its DNA-based vaccine against the mosquito-borne virus.(AP Photo/Ricardo Mazalan, File) FILE - In this Feb. 11, 2016 file photo of aedes aegypti mosquitoes are seen in a mosquito cage at a laboratory in Cucuta, Colombia. An experimental vaccine for the Zika virus is due to begin human testing in coming weeks, after getting the green light from U.S. health officials. Inovio Pharmaceuticals said Monday, June 20, 2016, that it received clearance from the Food and Drug Administration to begin early-stage safety tests of its DNA-based vaccine against the mosquito-borne virus.(AP Photo/Ricardo Mazalan, File)

WASHINGTON (AP) – An experimental vaccine for the Zika virus is due to begin human testing in coming weeks, after getting the green light from U.S. health officials.

Inovio Pharmaceuticals said Monday it received clearance from the Food and Drug Administration to begin early-stage safety tests of its DNA-based vaccine against the mosquito-borne virus. That puts the company ahead of researchers at the National Institutes of Health, who have said they expect to begin testing their own DNA-based Zika vaccine by early fall.

Inovio’s vaccine is intended to prime the immune system to fight Zika by introducing genetically-engineered material that mimics the virus. Inovio reports that animals tested with the vaccine developed antibodies and immune-system cells that attack Zika.

The NIH is working to develop a Zika vaccine by swapping out the genetic material from its experimental West Nile virus vaccine.

Inovio and its partner, GeneOne Life Science, plan to begin a 40-person study to determine the safest dose of the vaccine in coming weeks. Company officials said they expect results from the vaccine study by the end of 2016.