Up to twenty children in Peru have died from rabies after being bitten by vampire bats.
So now health workers are now vaccinating the most vulnerable in the remote Amazonas province of Condorcanqui, close to the border with Ecuador.
Families live in huts with hardly any walls and often not enough mosquito nets for everyone. The destruction of the rain forest appears to have led to a drop in the number of natural predators of the bats, helping them to thrive.
Now villagers are fighting back, collecting bats from caves so that scientists can sequence the DNA of the rabies virus to create a genetic map that may eventually help to reduce outbreaks.