Name Info Provider Link
subscription/membership/fee required Atypon https://www.liebertpub.com/doi/10.1089/bfm.2021.0079?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
COVID-19 Vaccines free resource MedlinePlus Health Information https://medlineplus.gov/covid19vaccines.html
Cited by Patents in free resource The Lens - Patent Citations https://www.lens.org/lens/search/patent/list?q=citation_id:34171971