THE ETHICS OF THE WALVAX-2 CELL STRAIN  Background: The WI-38 and MRC-5 cell strains are currently used in the production of human viral vaccines (MMR, Chickenpox, Hepatitis-A, Shingles, some rabies, and some polio vaccines). But since these cell lines are approaching the end of their ability to self-replicate, a group of Chinese vaccine researchers, Bo … Continue reading THE ETHICS OF THE WALVAX-2 CELL STRAIN