Home›Articles›Why the COVID-19 Vaccine Came So Fast: The Decades of Work Behind 2020ArticleWhy the COVID-19 Vaccine Came So Fast: The Decades of Work Behind 2020ArticlesConnectionsSourcesComments (0)Reader Challenges (0)ConnectionsArticle OnCOVID-19 Vaccine, Treatments Well-attested SourcesCOVID-19 vaccine (Wikipedia)tier 3WikipediaDevelopment section, paragraph on egg-grown vaccines versus mRNA, raw wikitext fetched 2026-09-21Quote, Development section, paragraph on egg-grown vaccines versus mRNA, raw wikitext fetched 2026-09-21Vaccines that use an inactive or weakened virus that has been grown in eggs typically take more than a decade to develop.View the SourceMedicine Atlas Original Articlestier 1Comments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.