Hillevax Inc. is turning its attention to preventing moderate or severe acute gastroenteritis events (AGEs) in adults with norovirus after the phase IIb NEST-IN1 trial testing virus-like particle-based vaccine HIL-214 in infants missed its primary and secondary endpoints, news that sent shares of the company (NASDAQ:HLVX) plummeting 88% to close July 8 at $1.64, a significant drop from the IPO price of $17 two years ago.