As I write this on December 17, the US Food and Drug Administrationâs Vaccines and Related Biological Products Advisory Committee is meeting to review a COVID-19 vaccine developed by biotech company Moderna. Likely outcome: The panel will recommend approval of the vaccine to FDA Commissioner Dr. Stephen M. Hahn. My question: What took so long, and why? As David Wallace-Wells reports at New York magazine, Moderna completed design of its vaccine on January 13 â only two days after the virusâs genetic sequence was released to the public by Professor Yong-Zhen Zhang of Shanghaiâs Fudan University and before any US cases of the virus had been confirmed.