Seres Therapeutics's VOWST divestiture injected cash, retired debt, and refocused the company as a clinical‑stage microbiome specialist. Their current lead candidate is SER‑155, which seems to reduce bloodstream infections up to 77% according to their Phase 1b trial. SER-155 also holds the FDA's Breakthrough and Fast Track designations. MCRB targets more interim Phase 2 SER‑155 data within 12 months.