Start building your ideal daily routine with Fabulous. The first 100 people who click on the link will get a FREE week trial and 25% OFF Fabulous Premium: https://thefab.co/scishow If you lost your arm almost immediately after being vaccinated, would you still be vaccinated? Hosted by: Michael Aranda 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: Silas Emrys, Drew Hart, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Christopher R Boucher, Eric Jensen, Adam Brainard, Nazara, GrowingViolet, Ash, Laura Sanborn, Sam Lutfi, Piya Shedden, KatieMarie Magnone, charles george, Alex Hackman, Chris Peters, Kevin Bealer, Alisa Sherbow ---------- 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: Differential dependence on target site tissue for gene gun and intramuscular DNA immunizations (1997) https://pubmed.ncbi.nlm.nih.gov/9144463/ https://www.jimmunol.org/content/jimmunol/158/10/4529.full.pdf?casa_token=hJY1dtw1OWsAAAAA:EXg-9JUIKudIOLeN4YrP8lfXgLF825_3NdUQiWnsW8r6keBU7jJ4XuYiSASJa6rO5NWFGr-v-m_hGSg AHA Worksheet (debunked!) WHO Vaccine info sheet: https://www.who.int/news-room/feature-stories/detail/how-do-vaccines-work Butt shot accuracy (2006) https://pubmed.ncbi.nlm.nih.gov/16495027/ Effect of anatomic injection site, age and smoking on the immune response to hepatitis B vaccination (1989) https://pubmed.ncbi.nlm.nih.gov/2530717/ Inadvertent subcutaneous injection of COVID-19 vaccine https://pmj.bmj.com/content/early/2021/02/15/postgradmedj-2021-139870.full mRNA Vaccines: What Happens (2021) https://blogs.sciencemag.org/pipeline/archives/2021/01/21/mrna-vaccines-what-happens Determination of deltoid fat pad thickness. Implications for needle length in adult immunization (1997) https://pubmed.ncbi.nlm.nih.gov/9169899/ The importance of injecting vaccines into muscle: Different patients need different needle sizes https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1118997/#B3 Lymphatic info: https://www.ncbi.nlm.nih.gov/books/NBK557720/