Immunizations Outbreaks of communicable diseases after floods are unusual. However, the rates of diseases that were present before a flood may increase because of decreased sanitation or overcrowding among displaced persons. Increases in infectious diseases that were not present in the community before the flood are not usually a problem. If you receive a puncture wound or a wound contaminated with feces, soil, or saliva, have a doctor or health department determine whether a tetanus booster is necessary based on individual records. Mosquitoes The large amount of pooled water remaining after the flood will lead to an increase in mosquito populations.
Mosquitoes are most active at sunrise and sunset.
The majority of these mosquitoes will be pests, but will not carry communicable diseases. Local, state, and federal public health authorities will be actively working to control the spread of any mosquito-borne diseases. Insect repellents containing DEET are very effective. Care must be taken when using DEET on small children. Products containing DEET are available from retail outlets and through local and state health departments.