Sionna cuts 46% of staff after cystic fibrosis trial failure, pivots to new drug combination on September 15, 2026 CF Cystic Fibrosis SION-2222 SION-451 SION-719 Sionna Therapeutics Trikafta workforce reduction +
Sionna's Cystic Fibrosis Drug Failure: Stock Down 90% and Vertex's Gain on August 10, 2026 90% 92% Cystic fibrosis sweat test Drops - Drug Form SION-719 Trikafta +