Nevada is the 16th state to report avian flu in dairy cattle. Iowa's poultry outbreak is its first since June.
The 3-part order also requires affected farms to share epidemiologic information and any positive test results.
The avian flu virus is also taking a heavy toll on California's commercial poultry farms.
Investigators found hundreds of dead poultry at the patient's family home.
State health officials said multiple positive results in recent days came from Raw Farm's retail milk, its storage tanks, and its bottling facility.
The authors say it's crucial to better understand how the virus is spreading, amid the ongoing risk of exposure to farm workers and transmission among animal species.
Officials said the purchase agreement with CSL Seqirus is part of longer-term plans to shore up vaccine supply against a wider range of pathogens that have pandemic potential.
Meanwhile, federal officials confirmed more detections on California dairy farms and at commercial poultry farms in 6 states.
USDA testing confirms more outbreaks in dairy cattle and poultry, and LA County warns that recalled raw milk was sold in at least 10 retail stores.
Extensive human, animal, and environmental tests were negative, and the closest phylogenetic match was to a virus from wild cackling geese.
