Several COVID-19 variants are acting uniquely enough to qualify as a distinct strain. And you might have heard about one on the news: the Delta variant. Today we’re going to talk about what it is, why it’s here, and what you need to know about it. Hosted by: Hank Green SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org/ ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Chris Peters, Matt Curls, Kevin Bealer, Jeffrey Mckishen, Jacob, Christopher R Boucher, Nazara, charles george, Christoph Schwanke, Ash, Silas Emrys, KatieMarie Magnone, Eric Jensen, Adam Brainard, Piya Shedden, Alex Hackman, James Knight, GrowingViolet, Sam Lutfi, Alisa Sherbow, Jason A Saslow, Dr. Melvin Sanicas ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com/ Instagram: http://instagram.com/thescishow ---------- Sources: https://www.nature.com/articles/d41586-021-02158-6 https://www.who.int/director-general/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-4-august-2021 https://www.who.int/publications/m/item/covid-19-virtual-press-conference-transcript---25-june-2021 https://www.bmj.com/content/bmj/373/bmj.n1631.full.pdf https://www.who.int/en/activities/tracking-SARS-CoV-2-variants/ https://www.who.int/emergencies/diseases/novel-coronavirus-2019/technical-guidance/naming-the-coronavirus-disease-(covid-2019)-and-the-virus-that-causes-it https://www.medrxiv.org/content/10.1101/2021.06.28.21259673v1.full https://www.who.int/publications/m/item/weekly-epidemiological-update-on-covid-19---20-july-2021 https://www.cnbc.com/2021/06/21/covid-delta-who-says-variant-is-the-fastest-and-fittest-and-will-pick-off-most-vulnerable-.html https://www.who.int/news-room/q-a-detail/coronavirus-disease-(covid-19)-vaccines-safety https://www.medrxiv.org/content/10.1101/2021.07.31.21261387v1 https://www.washingtonpost.com/health/breakthrough-infections-cdc-data/2021/07/28/dcaaa6b2-efce-11eb-a452-4da5fe48582d_story.html https://www.washingtonpost.com/health/2021/07/29/cdc-mask-guidance/ https://www.nature.com/articles/d41586-021-01986-w https://newseu.cgtn.com/news/2021-06-10/France-eases-COVID-19-restrictions-on-sports-halls-cafes-and-travel-10XE48f6am4/index.html https://www.france24.com/en/france/20210725-french-parliament-approves-law-requiring-restaurant-covid-pass-vaccine-rules https://abcnews.go.com/US/us-sees-signs-normal-states-lift-covid-restrictions/story?id=77999357 https://asm.org/Articles/2021/July/How-Dangerous-is-the-Delta-Variant-B-1-617-2 https://www.medrxiv.org/content/10.1101/2021.07.07.21260122v2 https://doi.org/10.1016/S0140-6736(21)01358-1 https://apnews.com/article/health-india-immunizations-coronavirus-pandemic-ab830864393480ea6dcc67b0571fc29c https://doi.org/10.1016/j.dsx.2021.05.009 https://www.news-medical.net/news/20210702/What-role-did-the-SARS-CoV-2-delta-variant-play-in-Indiae28099s-devastating-second-wave.aspx https://www.businessinsider.com/india-coronavirus-crisis-who-europe-head-warns-could-happen-anywhere-2021-4 https://www.who.int/news-room/feature-stories/detail/vaccine-efficacy-effectiveness-and-protection https://doi.org/10.1056/NEJMoa2108891 https://www.who.int/publications/m/item/weekly-epidemiological-update-on-covid-19---27-july-2021 https://www.cdc.gov/mmwr/volumes/70/wr/mm7021e3.htm https://www.reuters.com/world/china/how-delta-variant-upends-assumptions-about-coronavirus-2021-07-26/ https://www.who.int/emergencies/diseases/novel-coronavirus-2019/media-resources/science-in-5/episode-45---delta-variant https://covid19.who.int/region/wpro/country/au https://ourworldindata.org/coronavirus/country/australia https://www.voanews.com/covid-19-pandemic/australia-battles-surge-covid-19-infections https://www.medicalnewstoday.com/articles/whats-to-blame-for-the-latest-covid-19-outbreaks-in-australia https://www.theguardian.com/commentisfree/2021/jun/28/the-delta-variant-has-rebooted-covid-so-australia-must-reboot-its-strategy https://www.nytimes.com/2021/07/27/health/covid-cdc-masks-vaccines-delta-variant.html https://www.globaltimes.cn/page/202108/1230990.shtml https://doi.org/10.21203/rs.3.rs-637724/v1 https://www.cdc.gov/vaccines/covid-19/health-departments/breakthrough-cases.html