Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0264-410X(18)30211-1
Flu Shot	free resource	MedlinePlus Health Information	https://medlineplus.gov/flushot.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/29483030/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/29483030
	free resource	scite Smart Citations	https://scite.ai/reports/29483030
	free resource	Spiral, Imperial College Digital Repository	http://hdl.handle.net/10044/1/57009
Full text from	free resource	White Rose Research Online	https://eprints.whiterose.ac.uk/141770/