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I think this is liable to be an extremely confounding aspect of the venture - that meat naturally grows in the context of a living animals immune system which interfaces with the wider microbial reality. Diverse diseases arise and wane through extremely ancient dynamics which we are not close to having full knowledge or command over. I could not trust commercially driven scientific assurances from the present age, that food of all things can be mass produced safely in such a biologically novel scheme. It is not so long ago since all where shocked by the novel generation and danger of Prions in the food chain, some years later that "Junk DNA" is not in fact Junk, etc...

While some risk of strange new disease would still be chanced - it would be orders of magnitude less extreme if this cell cloning technology concentrated in early days, on mass producing leathers and furs, rather than the very matter we put into our living bodies.

In research often antibiotics are added to avoid contamination from handling etc. However, large scale and automated production processes can be run antibiotic free because of their very controlled sterile environment. Then the product would also be antibiotic free.

its easy just add antibiotics to the slurry