8 Most Dangerous Medicines on Earth3. “RotaTeq” rotavirus vaccine Image Credit: https://www.pinterest.com/pin/83387030577838343/This extremely toxic (oral) vaccine contains rotavirus strains (G1, G2, G3, G4, and P1), plus highly toxic polysorbate 80 and Fetal bovine syndrome. Also contains parts of porcine circovirus, a virus that infects pigs. Pages:< >