Tabriz University of Medical Sciences Advanced Pharmaceutical Bulletin 2228-5881 12 2 2022 03 09 Pitfalls at Chemistry of Adenoviral Vector Vaccine against COVID-19 and How to Circumvent it 217 218 10.34172/apb.2022.024 EN Amr Ahmed https://orcid.org/0000-0003-3477-236X Mohammad Nezami Abdullah Alkattan https://orcid.org/0000-0001-5294-8088 LETTER 10.34172/apb.2022.024 2021 06 29 2021 08 03