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There are more than just 2 cell lines of aborted fetal tissues from 60 years ago. The latest being a female in 2015: As stated below " BUT SINCE THESE CELL LINES ARE APPROACHING the END of THEIR ABILITY to SELF-REPLICATE"
THE ETHICS OF THE WALVAX-2 CELL STRAIN
Backgroundemphasis added)
"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 Ma et al, have developed a NEW (human diploid) cell strain, Walvax-2. And just as in the 1960s Leonard Hayflick (WI-38) and JP Jacobs (MRC-5) derived their respective cell substrates from 2-4 month-old electively aborted lung fetal tissue, so Bo Ma et al. in 2015 derived their cell strain from the lung fibroblast tissue of a three month-old electively aborted fetus. "
http://ethicalresearch.net/pos....itions/the-ethics-of
