MICROBUBBLES

Summary from the TLDR newsletter

Microbubbles are tiny gas-filled bubbles with a protective outer shell that are capable of carrying drugs or genetic material to cells in the body. They are too large to leave the bloodstream, so they deliver drugs by bursting on command, briefly forcing open biological barriers to allow treatments to pass through. The force of their bursts can be used to break apart kidney stones. These bubbles can be steered, so they can carry therapies through the bloodstream to release precisely where they're needed.