Here's a rabbit hole to go down:
https://www.cdc.gov/bird-flu/caring/index.html
What is a "150-day fallow"?
It means waiting 150 days after eliminating all the chickens in an area for any virus remaining in that area to no longer be viable.
alt Hacker News
It means waiting 150 days after eliminating all the chickens in an area for any virus remaining in that area to no longer be viable.