https://pjmedia.com/news-and-politics/stacey-lennox/2020/05/26/vaccine-development-threatened-as-covid-19-infections-decline-n428072
https://www.smh.com.au/world/europe/low-virus-rate-leaves-oxford-vaccine-trial-with-only-50-percent-chance-20200524-p54vvu.html
