Durable goods can be cost-effective but make great disease vectors, and disposables like syringes and needles can be a problem in the poorest places, where there's desperate need of vaccines for diseases like polio. That's where the UCSD scientists come in. 2016 January 14, Jessica Hall, “Nanoengineers build 'microcannons' that fire light-up bullets filled with drugs”, in ExtremeTech:
“We have been working on nanomachines over the past decade,” Joseph Wang, chairman of nanoengineering at UCSD, said. “One of the challenges we considered is to deliver therapeutic cargo deep. 2016 February 1, Tom Whipple, “Microcannon firing nanobullets: the future of targeted medicine”, in The Times: