Al-Hamada travelled the world to share his testimony on the horrors of Assad's regime that he experienced in prison.

Additional mosquito trapping and testing done in areas where dead birds were located has not found any positive mosquitoes, the San Mateo County Mosquito and Vector Control District said.

People can report dead animals or bats to their local animal control, which will alert the local vector control district, an agency that specializes in animals or insects that can make people sick.