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"VCTB." Fullformexpand.com, https://www.fullformexpand.com/vctb/vaccine-clinical-trials-branch. Accessed 23 Feb. 2026.
Fullformexpand.com, 2026. "VCTB." Accessed February 23, 2026. https://www.fullformexpand.com/vctb/vaccine-clinical-trials-branch.
"VCTB." (n.d.). Fullformexpand.com. Retrieved February 23, 2026, from https://www.fullformexpand.com/vctb/vaccine-clinical-trials-branch.
VCTB. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/vctb/vaccine-clinical-trials-branch (Accessed: 23 February 2026).