Covishield not to be taken by people severely allergic to any of its ingredients: Serum Institute PTI New Delhi | Updated on January 19, 2021 × The ingredients are L-Histidine, L-Histidine hydrochloride monohydrate, Magnesium chloride hexahydrate, Polysorbate 80, Ethanol, Sucrose, Sodium chloride, Disodium edetate dihydrate, water for injection People who are severely allergic to any ingredient of Covid-19 vaccine ‘Covishield’ are advised not to take it, Serum Institute of India said. According to the fact sheet for the vaccine recipient by the Serum Institute of India, one should not ...