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  1. May 2019
    1. Inbred male BALB/c.T mice (6-8 week, Small Experimental Animal Facility, National Institute of Immunology, New Delhi, India) were immunized intramuscularly (i.m.) with 100 J.lg of respective plasmid DNA or VR1020 vector in 100 J.ll saline (0.9% NaCl) in the anterior tibialis muscle in the hind limbs (each receiving 50 J.ll). Two booster injections of 100 J.lg DNA in saline were given on day 21 and 35. On day 45, mice in each group received i.m. injection of E. coli expressed recombinant protein (20 J.lg/mouse in saline). Mice were anesthetized and bled retro-orbitally on days 0, 45 and 52 for analysis of respective antibody responses.