Thousands of cases of the chikungunya virus, which sickens people bitten by an infected mosquito, have broken out in China during the past week. The virus causes extremely severe joint pain and fever,

The terrifying mosquito-borne disease has swept through the country's Guangdong province with more than 7,000 cases.

Experts say the painful infection, spread to people from mosquitoes, can get to many countries if it finds the right hosts