Khatrawi, E.M., Prajjwal, P. and Ranjan, R. 2022. Type 1 hypersensitivity from vitamin B12 injection: a case report. International Journal of Research in Medical Sciences. 10, 11 (Oct. 2022), 2671–2673. DOI:https://doi.org/10.18203/2320-6012.ijrms20222634.