2024. At Least 55 Undeclared Chemical Elements Found in COVID-19 Vaccines from AstraZeneca, CanSino, Moderna, Pfizer, Sinopharm and Sputnik V, with Precise ICP-MS. International Journal of Vaccine Theory, Practice, and Research . 3, 2 (Oct. 2024), 1367–1393. DOI:https://doi.org/10.56098/mt1njj52.