Answer : 2. "mRNA Vaccines"
Explanation :

Catalin Carico and Drew Weissman have been awarded the 2023 Nobel Prize in Physiology or Medicine for their groundbreaking work in nucleoside base modifications. His research has paved the way for the creation of a highly successful mRNA vaccine against COVID-19. In the future, this technology could also be used to deliver therapeutic proteins and treat certain types of cancer.