Name Info Provider Link
Flu free resource MedlinePlus Health Information https://medlineplus.gov/flu.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31009301/
subscription/membership/fee required Taylor & Francis https://www.tandfonline.com/doi/full/10.1080/21645515.2019.1599679
free resource Europe PubMed Central https://europepmc.org/abstract/MED/31009301