Scientists fed Aedes aegypti mosquitoes blood laced with weakened rabies and Nipah viruses, then let those insects bite bats and mice in a controlled lab setting. The animals developed neutralizing antibodies against both pathogens,

Vaccines have prevented diseases that once caused paralysis, deafness, pneumonia, meningitis, liver failure, certain cancers and death. They are among the most significant medical breakthroughs in the history of public health and protect both individuals ...