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More than 700 million people become sick from these diseases every year. At least 2 million of these people
will die from these diseases.
Many scientists are working on safer and better ways to kill mosquitoes, but so far, there is no sure way
to protect everyone in the world from their deadly bites. Mosquito nets can be placed over beds to protect
people against being bitten. These nets help people stay safe at night, but they do not kill any mosquitoes.