Vaccine molecule

As a detective solving the mystery of the crossword clue ‘Vaccine molecule‘, I first considered the most common vaccines and their components. I knew that vaccines typically contain weak or dead versions of a virus or bacteria, which stimulate the body’s immune system to produce antibodies that can fight off the actual virus or bacteria if encountered later on. As I continued to ponder the clue, I remembered the recent development of messenger RNA (mRNA) vaccines, such as the Pfizer-BioNTech and Moderna COVID-19 vaccines. These vaccines work by using a small piece of mRNA to instruct cells to produce a harmless piece of the virus that can trigger an immune response. Based on this understanding, I realized that the answer to the crossword clue must be RNA, as it is the essential molecule used in mRNA vaccines to help produce immunity against a virus or bacteria. Overall, my thought process involved considering the common components of vaccines and drawing upon recent developments in vaccine technology to arrive at the correct answer.