IVVD ▲ +1.5% - Invivyd, Inc. $IVVD - Invivyd and the SPEAR Study Group Announce Initiation of “FLINTLOCK” Phase 2 Study of VYD2311, a Monoclonal Antibody for the Potential Treatment of Long COVID or Post-Vaccination Syndrome 14-OCT-2026 07:01 AM ET