Nanobubbles [1] are already being studied for this very purpose. Drugs are packaged within small bubbles, and injected into the blood stream. Targeted drug deli

Nanobubbles [1] are already being studied for this very purpose. Drugs are packaged within small bubbles, and injected into the blood stream. Targeted drug delivery is performed by popping the bubbles using ultrasound waves from an external speaker. [1] http://www3.imperial.ac.uk/newsandeventspggrp/imperialcollege/newssummary/news_24-6-2013-12-14-37 http://www3.imperial.ac.uk/newsandeventspggrp/imperialcolleg...