About This Source - NBC News
NBC News is the news division of the American broadcast television network NBC.
NBC News aired the first, regularly scheduled news program in American broadcast television history on February 21, 1940.
Recent from NBC News:
NBC News published this video item, entitled “Live: NBC News NOW – November 27” – below is their description.
NBC News NOW is live, reporting breaking news and developing stories in real time. We are on the scene, covering the most important stories of the day and taking deep dives on issues you care about. Be sure to read our latest breaking news updates, fact checks and our frequently updated live blog at NBCNews.com/2020. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews » Read our Live Blog: http://www.nbcnews.com/2020 NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! NBC News App: https://apps.nbcnews.com/mobile Breaking News Alerts: https://link.nbcnews.com/join/5cj/breaking-news-signup?cid=sm_npd_nn_yt_bn-clip_190621 Visit NBCNews.Com: http://nbcnews.to/ReadNBC Find NBC News on Facebook: http://nbcnews.to/LikeNBC Follow NBC News on Twitter: http://nbcnews.to/FollowNBC Follow NBC News on Instagram: http://nbcnews.to/InstaNBC #Vaccine #Biden #2020Election Live: NBC News NOW – November 27NBC News YouTube Channel
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In This Story: Vaccine
A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins.