Contact General Contact Selecta Biosciences, Inc. 65 Grove StreetWatertown, MA 02472 617-923-1400 info@selectabio.com Media Brittany Leigh, PhD — LifeSci Communications 813-767-7801 bleigh@lifescicomms.com Partnership Selecta Partnerships partnerships@selectabio.com IR Contact Bruce Mackle — LifeSci Advisors,LLC. 929-469-3859 bmackle@lifesciadvisors.com