Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S1525-0016(19)30412-5
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/31624015/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31624015
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:31624015