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workers practicing vector control by digging a drainage ditch in order to help disperse standing water
twenty two eggs deposited by a female anopheles stephensi mosquito
these tracks in snow were made by a deer mouse peromyscus maniculatus
saltmeadow cordgrass spartina patens watery marsh was traversed by a network of drainage ditches
men conducting a plague study in the san francisco area by capturing vector carrying rodents
personal protection by putting on double masks
this location was one of the many hospitals visited by public health officials during the 1975 rhodesian
flu is a contagious respiratory illness caused by influenza viruses it can cause mild to severe
more than 800 children came out to see the first viewing by rickshaw of sisimpur bangladeshs
the izalco volcano partially covered by clouds is a natural draw for tourists
sidr affected damaged roads were repaired by local community to ensure transportation of relief supplies
women wait by their sick babies while they receive treatment in the municipal hospital
crossing rice paddies by using man made earthen bridges
surveillance teams traveling by jeep in zaire now the democratic republic of congo
