再請教一下，這個演化了37代和冰島的研究中提到的291 mutations是一回事嗎？

演化一代的時間是否基本是固定的？

Currently, 291 mutations of the virus have been found in the country that have not been identified elsewhere, according to decode.com.

https://icelandmonitor.mbl.is/news/news/2020/04/15/article_on_covid_19_in_iceland_in_new_england_journ/