1. Department of Health. Philippines. DOH identifies vaccine hesitancy as one of the reasons for measles outbreak. 11 February 2019. www.doh.gov.ph/node/16721.
2. Measles cases in Europe tripled from 2017 to 2018
3. Philippines halts dengue immunisation campaign owing to safety risk;Dyer;BMJ,2017
4. World Health Organization. Ten threats to global health in 2019. www.who.int/emergencies/ten-threats-to-global-health-in-2019.
5. Charles S, Radnofsky C. Amid measles outbreak, some unvaccinated teens are seeking ways to get their shots. NBC News, 11 February 2019. www.nbcnews.com/storyline/measles-outbreak/teens-defying-their-parents-get-vaccinated-amid-measles-outbreak-n970341.