Name	Info	Provider	Link
Vaccines	free resource	MedlinePlus Health Information	https://medlineplus.gov/vaccines.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/28861908/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/28861908
	free resource	Wiley	https://onlinelibrary.wiley.com/doi/10.1002/eji.201746942
	free resource	scite Smart Citations	https://scite.ai/reports/28861908
	free resource	Spiral, Imperial College Digital Repository	http://hdl.handle.net/10044/1/51892