Name	Info	Provider	Link
	free resource	CDC-NCEZID	https://doi.org/10.3201/eid2504.181554
Flu	free resource	MedlinePlus Health Information	https://medlineplus.gov/flu.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30882323/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30882323