1. Needle phobia: a neglected diagnosis;Hamilton;J Family Pract,1995
2. The injection century: massive unsterile injections and the emergence of human pathogens;Drucker;The Lancet,2001
3. Centers for Disease Control and Prevention. Flu Vaccination Coverage, United States, 2018-19 Influenza Season. https://www.cdc.gov/flu/fluvaxview/coverage-1819estimates.htm. Published 2019. Accessed.
4. U.S. Department of Health and Human Services. Healthy People 2020. https://www.healthypeople.gov/2020/topics-objectives/topic/immunization-and-infectious-diseases/objectives. Published 2013. Accessed.
5. Engineering Microneedle Patches for Vaccination and Drug Delivery to Skin;Prausnitz;Annu Rev Chem Biomol Eng,2017