[shagie]

There's a good page on how the traditional flu vaccines are made at https://www.cdc.gov/flu/prevent/how-fluvaccine-made.htm

One of the "this is concerning" things with the traditional chicken egg based version is that they are chicken eggs.

https://www.cnn.com/2020/03/27/health/chicken-egg-flu-vaccin... and an amusing video on it from Half as Interesting - https://youtu.be/F0qD5argOHE

The corresponding part is that they are chickens and you've likely heard about the price of eggs recently ( https://arstechnica.com/science/2023/01/as-egg-prices-soar-t... ).

There is good reason to be looking at alternative ways to creating vaccines.