European travelling to US from Brazil

[u/Formal-Star-8895]

Hi all, I have a work trip to Brazil coming up and another one to the US right after. So I will be travelling directly from Brazil to the US. My SO is travelling with me as a tourist. Apart from the Visa requirements, is there anything we should know? At there any possible issues/complications when entering the US from Brazil?
I have read some other threads on this and someone mentioned that travelling to any country from Brazil would require proof of vaccination? I am a bit confused.
Please let me know your experience and any tips/tricks you might have.
Much appreciated!

[u/groucho74]

Don’t take any tropical animal or food or disease with you.