1 Hong Kong flu: https://en.wikipedia.org/wiki/Hong_Kong_flu
2 Frank Plummer: https://www.nytimes.com/2003/04/24/world/sars-epidemic-scientists-virus-proves-baffling-turning-up-only-40-lab-s-test.html
3 Dutch scientists
4 Mexican (swine) flu: https://en.wikipedia.org/wiki/2009_swine_flu_pandemic
5 Zika virus: https://www.webmd.com/a-to-z-guides/zika-virus-symptoms-prevention
6 Zika WHO: Https://www.who.int/health-topics/zika-virus-disease#tab=tab_1