(CNN) Covid-19 vaccines are starting to roll out in several countries, a momentous breakthrough that hopefully signals a light at the end of this dark pandemic. Karikó has spent decades of her career researching the therapeutic possibilities of mRNA, a component of DNA that is considered to be one of the main building blocks of life. Now, that work is the basis of the Covid-19 vaccine. From Hungary to the USKarikó, 65, began her career in her native Hungary in the 1970s, when mRNA research was new and the possibilities seemed endless. In 1985, she and her husband and young daughter left Hungary for the US after she got an invitation from Temple University in Philadelphia.

Source: CNN December 16, 2020 20:26 UTC