Thank you all for the advice. Yes, that was my mistake on describing the Hela cells, however my intention was to include it in the discussion as from my understanding - the utilization was done without consent. I should have clarified (hence why I listed it as an example).
I am not Catholic, however the argument he made seems to be reiterated, so I used it as a reference. Why I added my reasoning against using cell lines like HEK293 are similar to why you wouldn't ingest human placentas. Dignity of the person. In scripture we see it forbidden to eat the blood of animals, as this seems to me to represent the life of the animal and not just it's components. While I wholeheartedly agree tissue is just tissue, the same goes for spiritual wellbeing. God "transplanted" a rib for a good purpose, but I think most would agree consent is appropriate for humans engaging in medicine. I would agree except on the grounds of consent, as I hope doctors still follow the laws regarding organ donation. I had also read an article they had to actually time the abortion to coincide with cell preservation, but I cannot find it for HEK cells so this is conjecture for the discussion.
My original consensus was the same as most here, since many vaccines such as the MMR have used older cell lines. As I dug further it became more disturbing to me. The first reason being the promise of adult stem cells, and how many non-human cell lines or embryos would likely be sufficient for use instead. If anyone is interested I can dig up the articles.
Second, these lines required perfectly viable infant tissue that was differentiated enough to be called actual kidney cells like you mentioned. The infant would have been healthy and thriving. This is more disturbing if you read about how several Coronavirus vaccines already have been reusing these cells instead of using animal tissue like many other vaccines already use. Just because it's harder to do, doesn't make it less legitimate to me.
As far as the cells being old, there are more than the HEK 293, there is PER.C 6, WI 26 which was fetal lung tissue. Here is an example seller listing:
https://www.sigmaaldrich.com/catalog/product/sigma/cb_89101301?lang=en®ion=US. My struggle is while we continue to legitimize their use, there is no incentive to utilize animal tissue or adult stem cells. Enbrel is a pharmaceutical that was developed from the WI 26 line. There was even one just made in 2015 called WALVAX 2. Here is a link: https://www.informedchoicewa.org/human-fetal-cells/. It is my knowledge they are trying to use this for newer vaccines in the future. Although I agree they last a long time, practically the strains are not immune to contamination or varying traits developing over time making them less reliable. I do see your point on differences between immortal lines and active testing, but as I mentioned above there is still some reasons why I am still apprehensive about "immortal" lines.
To me, there is no differentiation between a derivative product and it's orgin collection methods. Sure, if the embryo was actually born that'd be a different story, but these lines came from actual infants not embryos. Plus I believe life begins at conception, which I respect if anyone disagrees however that is my own view. The Bible seems to define us as Spirits with bodies, not the other way around unless someone is willing to influence me otherwise. Also, these will eventually run out, since they only have so many effective doubling cycles. No line is infinite, if we don't stop now I don't see how we would stop using them. Prices are influenced by demand and policy. So I agree we should follow laws, but if I must I am considering drawing a line in the sand on using these types of vaccines on myself or promoting it in any way. That being finding another occupation. I want to do either one with 110%.
Lastly, a related topic involves snowflake adoption. A sordid consequence of devaluing embryos happens during in-vitro fertilization. Because it is only safe to implant more then a few and the fertilize many at a time, frozen embryos often get destroyed during disputes or loss of ability to pay. While it seems unrelated, we are also not far off from making artificial wombs so Star Wars type scenarios might be possible in the lingering future. The way I see it now is if we continue to sell these lines, they are incentivized to make another like the WALVAX 2.
I graduated with an ASCP Medical Laboratory Technologist diploma, and was trained to be a generalist. I took the vaccines for my rotation, and wish I had been more vigilant about studying these. They really never talked about these in class so I chalked it up to them being old cell lines.