According to the U.S. CDC, the best prevention against contracting hantavirus is to eliminate or minimize contact with rodents in the home, workplace, or campsite. As the virus can be transmitted by rodent saliva, excretions, and bites, control of rats and mice in areas frequented by humans is key for disease prevention. General prevention can be accomplished by disposing of rodent nests, sealing any cracks and holes in homes where mice or rats could enter, setting traps, or laying down poisons or using natural predators such as cats in the home. The duration that hantaviruses remain infectious in the environment varies based on factors such as the rodent's diet, temperature, humidity, and whether indoors or outdoors. The viruses have been demonstrated to remain active for 2-3 days at normal room temperature, while ultraviolet rays in direct sunlight kill them within a few hours. Rodent droppings or urine of indeterminate age, though, should always be treated as infectious. Vaccine , no vaccines against hantaviruses have been approved by the U.S. FDA, but whole virus inactivated bivalent vaccines against Hantaan virus and Seoul virus are available in China and South Korea. In both countries, the use of the vaccine, combined with other preventive measures, has significantly reduced the incidence of hantavirus infections. Apart from these vaccines, four types of vaccines have been researched: DNA vaccines targeting the M genome segment and the S genome segment, subunit vaccines that use recombinant Gn, Gc, and N proteins of the virus, virus vector vaccines that have recombinant hantavirus proteins inserted in them, and virus-like particle vaccines that contain viral proteins, but lack genetic material. Of these, only DNA vaccines have entered into clinical trials.
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