@cbsnews: The United States is warning travelers about an outbreak of chikungunya in China — a virus that spreads to humans through mosquito bites. The CDC has issued a Level 2 travel notice, urging people heading to the country to "practice enhanced precautions." Most cases have been reported in the Guangdong Province, where more than 7,000 infections have been recorded in recent weeks. To combat the outbreak, Chinese authorities are using drones, spraying insecticides and releasing giant elephant mosquitoes that eat the virus-carrying mosquitoes, along with fish that feed on mosquito larvae. Read more in the link.