0001453687 2021-05-10 2021-05-10 0001453687 false 8-K 2021-05-10 SELECTA BIOSCIENCES, INC. DE 001-37798 26-1622110 65 Grove Street, Watertown, MA 02472 617 923-1400 false false false false Common Stock (Par Value $0.0001) SELB NASDAQ true true