During SARS, researchers moved from obtaining the genomic sequence of SARS-CoV to a phase 1 clinical trial of a DNA vaccine in 20 months and have since compressed that timeline to 3.25 months for other viral diseases. For 2019-nCoV, they hope to move even faster, using messenger RNA (mRNA) vaccine technology. Other researchers are similarly poised to construct viral vectors and subunit vaccines.
https://jamanetwork.com/journals/jama/fullarticle/2759815
大部分都是已知的消息了，不过最后一段
During SARS, researchers moved from obtaining the genomic sequence of SARS-CoV to a phase 1 clinical trial of a DNA vaccine in 20 months and have since compressed that timeline to 3.25 months for other viral diseases. For 2019-nCoV, they hope to move even faster, using messenger RNA (mRNA) vaccine technology. Other researchers are similarly poised to construct viral vectors and subunit vaccines.
就是说SARS以后NIH已经可以用新科技（不好意思，我是搞临床研究不是搞基础研究的，具体啥科技我也不太明白）把一个新病毒用少于三个月的时间研发出疫苗
https://www.reuters.com/article/us-china-health-vaccines/with-wuhan-virus-genetic-code-in-hand-scientists-begin-work-on-a-vaccine-idUSKBN1ZN2J8
媒体说已经在研究了，大概5月份可以生产，中国第一时间就把测序出来的病毒的基因放在网上公开了
除了NIH, 加拿大 澳大利亚 当然还有中国都在研究
了解一下FDA批准药物的流程吧，没有approved但可以批准clinical trials （phase 1，2，3；病人样本数的要求不一样），lz引用的文章也说了sars那个DNA vaccine是clinical trial1，我没查时间，但估计Sars自己消失了就没必要上2期、3期实验了啊。