Moderna's work on a prepandemic vaccine began last year, and the new award has an option for large-scale production, if needed.
The FDA said the study compliments an initial study the agency did this spring testing 297 samples of commercial dairy products.
The USDA said it will start accepting applications for compensation on July 1.
The latest H5N1 confirmations in cats involved animals from Texas and Minnesota.
The FDA will sample more retail products across different regions, and a Michigan-led study serology study is underway in workers from affected farms.
The H5N1 cattle virus remained infectious in unpasteurized milk on stainless steel and rubber inflation lining after 1 hour.
A roundup of the latest news on H5N1 in dairy cattle.
ASPR is monitoring the situation closely and making resources like protective equipment available to state and local partners.
Researchers' other tests found no antibodies in cows in German regions affected by the virus or evidence of virus in milk samples.
Officials didn't say how the man contracted the virus, but most past cases involved contact with poultry or poultry environments.
