system
Given the following post, respond as if you're commenting on Reddit:
human
Why do Virologist use Vero(Monkey Kidney) cells to culture respiratory viruses and respiratory tract cells?

Edit: *And not Respiratory tract cells*
gpt
Think of vero cells as the factory to make virus in vivo. It doesn't need to be the perfect target for infection, it needs to make more virus.

Vero cells are an established immortal cell lines. You can grow them (nearly) indefinitely and keep a stock going all the time. They grow dense and have good yields of viral products. Respiratory tract cells are more specialized and a little harder to keep going and die before producing a lot of virus. Respiratory cells are also hard to scale up for large production runs because they need more space in the flask.