Name	Info	Provider	Link
	free resource	CDC-NCEZID	https://doi.org/10.3201/eid2601.191110
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/31574242/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31574242