Shares of mRNA therapeutics specialist Translate Bio Inc. (NASDAQ:TBIO) fell 30.9% to $17.76 on March 18 over concerns about a new interim analysis of phase I/II data for its cystic fibrosis (CF) candidate, MRT-5005. Several dosing regimens of the inhaled candidate failed to improve a key measure of lung function vs. placebo, in contrast to an earlier readout on other doses tested in the ongoing study, called Restore-CF.