Not where I live...
I buy my feed when it goes on sale. I transfer it into plastic 5-gallon buckets with good airtight lids. I have a bunch of 5-gallon buckets that I got from Harbor Freight. They have periodic sale weekends where you get a FREE bucket with a small purchase...
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Assuming your feed is good when you buy it, it will stay fresh in those airtight buckets for a number of months. I buy my feed on sale and save a lot of money on feed costs by storing them in 5-gallon buckets.

Another benefit, for me, of using the 5-gallon buckets is that each bucket holds about 25# of feed. It is much easier for me to move a 25# 5-gallon bucket of feed with a nice handle than trying to lift and move a 50# bag of feed with nothing to grab on and hold.
Also, I store my chicken feed in my garage, so having a good lid on the buckets keeps the mice out! Nothing worse for the old ticker than scooping out chicken feed early in the morning and a mouse jumps out and runs up your sleeve!
Google picture of what my feed bags would like back in the day before I started to using the 5-gallon buckets...
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FWIW, I have never purchased vaccinated chicks in my 40+ years of raising birds, on and off, but it also depends on where you live. If you have known problems in your locale, then I guess I would have the chicks vaccinated.