Think Out LoudSwitching arms between vaccine doses could dramatically improve immune response, OHSU study showsBy Gemma DiCarlo (OPB)Feb. 16, 2024 5:57 p.m. Updated: Feb. 26, 2024 11:07 p.m.Broadcast: Tuesday, Feb. 20📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up