Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0264-410X(21)01151-8
Tetanus, Diphtheria, and Pertussis Vaccines	free resource	MedlinePlus Health Information	https://medlineplus.gov/tetanusdiphtheriaandpertussisvaccines.html
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy/pii?v=S0264-410X(21)01151-8