https://www.cnn.com/2019/06/10/health/whooping-cough-vaccine-study/index.html
https://ktla.com/2019/03/16/despite-vaccination-nearly-50-harvard-westlake-students-catch-whooping-cough/
https://www.pnas.org/content/111/2/787
https://sboh.wa.gov/Portals/7/Doc/Meetings/2019/03-13/Tab09e-Cherry%20JPIDS%202019.pdf
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