system
Given the following post, respond as if you're commenting on Reddit:
human
Why are virus vaccines grown in animal cells instead of human cells?
gpt
It really has less to do with animal vs human. Vaccine production, much like other bio therapeutic production (antibodies, protein drugs) are grown with cell lines. Some of these are originally derived from animal tissues, others from human tissues. These are highly engineered tools, which are optimized to produce lots of protein and replicate rapidly to high scale in containers called bioreactors. As long as these cells contain the appropriate surface proteins and support viral replication they are a good tool for the job.