A. KRISHNAN, A. S. B S, A. LEKSHMI, A. R S, and S. S. Dharan, “Safety Surveillance of Covid 19 vaccine in tertiary care hospital among target population - an observational study”, J. Drug Delivery Ther., vol. 12, no. 5, pp. 182–187, Sep. 2022, doi: 10.22270/jddt.v12i5.5596.