Name Info Provider Link
COVID-19 Vaccines free resource MedlinePlus Health Information https://medlineplus.gov/covid19vaccines.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=34021625.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34021625/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/34021625
subscription/membership/fee required Wiley https://doi.org/10.1111/jdv.17343
free resource scite Smart Citations https://scite.ai/reports/34021625