Human embryonic stem stem cells (hESCs) derived from human fetal tissue were used to genetically engineer the COVID-19 pathogen in the infamous Ralph S. Baric’s laboratory at the University of North Carolina at Chapel Hill as documented in this Nature magazine article, "A SARS-like cluster of circulating bat coronaviruses shows potential for human emergence," published 9 November, 2015, which was followed by a similar study done by the same team at UNC and published on March 14, 2016, entitled, "SARS-like WIV1-CoV poised for human emergence."
Researchers used a hormone called fetal clone serum which was needed to obtain sufficient amounts of novel coronavirus to pass through humanized mice.
Dr. Kathleen Ruddy explains in her very informative video, "No Abortion, No Pandemic: How Fetal Tissue Was Used to Create the SARS CoV-2 Spike Protein," that fetal clone serum is a hormone synthesized from human fetal tissue. She points out that the researchers state very clearly that they used fetal clone serum and identify its source as Hyclone, South Logan, UT.
Screenshot from study:
In addition to the fetal clone serum, UNC researchers in a subsequent key study, "SARS-like WIV1-CoV poised for human emergence," discuss how the SARS-COV2 pathogen was further refined, stating that the humanized mice "were generated by microinjection of fertilized C3H × C57BL/6 (C3B6) F1 hybrid oocytes with an expression cassette consisting of the HFH4/FOXJ1 lung ciliated epithelial cell-specific promoter elements."
Screenshot from the study:
Footnote 11 (11) on the sixth line refers to an October 3, 2003 clinical study demonstrating how a fragment of the human FOXJ1 antibody was used to produce humanized mice. The FOXJ1/HFH4 antibody is selected using the HEK293 stem cell line, which was extracted from the kidney of a live aborted child in the 1970's in the Netherlands. (Read here for more on the origins of the HEK293 stem cell line.)
In another article I discuss how Professor Gerard S. Harbison, Emeritus Professor at the Department of Chemistry University of Nebraska-Lincoln, explained in a Twitter thread that the HEK293 stem cell line is used to select antibodies in the production of Regeneron's monoclonal antibody cocktail:
In summary, the SARS-CoV2 pathogen made transmissible to humans by Ralph Baric and his collaborators at UNC and Wuhan could not have been engineered without hESC’s obtained through the sacrifice of aborted babies, particularly by the use of human fetal tissue-derived fetal clone serum and the HFH4/FOXj1 antibody which was selected with the use of the HEK293 stem cell line.
From Dr. Ruddy's video:
“We’ve got fetal tissue rocking through the creation of the agent that was let loose on the world and has devastated the world. Brought us to our collective knees, created chaos, created collapse in our finances and our economies, and so on. You can’t do this kind of research without abortion. You don’t get humanized mice without humans, and you don’t get the human part without fetal tissue, and you don’t get fetal tissue unless you’re doing abortions.”
(Dr. Kathleen Ruddy, founder of the Breast Health and Healing Foundation. Dr. Ruddy is is an internationally recognized breast cancer surgeon trained at Memorial Sloan-Kettering Cancer Center and is also affiliated with Harvard Medical School.)