The latest iteration of these nanoscale drills are activated by visible light rather than ultraviolet, as in earlier versions. These have also proven effective at killing bacteria through tests on real infections.
Viruses can make animals and humans sick - or healthy: Researchers have succeeded in genetically modifying the herpes simplex virus type 1, which triggers painful cold sores, in such a way that it can be used in the fight against cancer in the future.
