https://www.youtube.com/watch?v=nUwDiYnz6dQ
see also
https://www.nytimes.com/2020/05/18/health/coronavirus-vaccine-moderna.html
see also
https://www.facebook.com/TaiwanPerDoctor/posts/507444569950584 (ADE, antibody-dependent enhancement 抗體依賴的增強作用)