1https://www.ted.com/talks/hans_rosling_the_good_news_of_the_decade?utm_campaign=tedspread&utm_medium=referral&utm_source=tedcomshare
2http://www.nfid.org/about-vaccines/vaccine-science/vaccine-science-infographic.pdf
3https://www.ted.com/talks/mark_kendall_demo_a_needle_free_vaccine_patch_that_s_safer_and_way_cheaper?utm_campaign=tedspread&utm_medium=referral&utm_source=tedcomshare
4https://portal.ct.gov/-/media/SDE/Science/NGSS_Boards.pdf?la=en
5https://www.historyofvaccines.org/timeline/all
6The life and death of smallpox Authors: Ian Glynn, Jenifer Glynn Publisher: Profile Books, London; 2004
7https://www.cdc.gov/vaccines/vac-gen/immunity-types.htm
8https://www.mydr.com.au/travel-health/vaccination-and-antibodies
9https://www.cdc.gov/vaccines/hcp/infographics/you-call-the-shots-intramuscular-flu-vaccination.html
10https://www.cdc.gov/vaccines/vac-gen/immunity-types.htm
11https://www.interaction-design.org/literature/topics/design-thinking