“Addendum to “HCG Found in Tetanus Vaccine”: Examination of Alleged ‘Ethical Concerns’ Based on False Claims by Certain of Our Critics”. International Journal of Vaccine Theory, Practice, and Research 1, no. 1 (July 15, 2020): 27–50. Accessed March 24, 2026. https://mail.ijvtpr.com/index.php/IJVTPR/article/view/3.