It turns out we have secret farms here where chickens are raised to lay special eggs (fertilized) for breeding flu vaccines. Each year about 145 million such eggs are needed. The locations are classified because this is a matter of national security.
https://www.cnn.com/2020/03/27/health/chicken-egg-flu-vaccine-intl-hnk-scli/index.html
Hi, I'm Rauf Aliev. 