STEVE KARNOWSKI, Associated Press

MINNEAPOLIS (AP) — Federal officials say they’re taking steps to create a human vaccine for the bird flu virus that’s affected the Midwest poultry industry, though they still consider the danger to be low.

The state of Kansas lifted restrictions on the movement of poultry flocks in parts of Leavenworth and Wyandotte counties imposed after a case of bird flu was confirmed last month.

Dr. Alicia Fry, an influenza expert with the federal Centers for Disease Control and Prevention, says they’re optimistic there won’t be any human cases of the H5N2 strain that has cost chicken and turkey producers nearly 6.8 million birds so far.

She said Wednesday that most human infections with other bird flu viruses have required close, prolonged contact with infected birds. So, officials are monitoring farm workers who’ve been exposed to affected flocks.

Fry said the CDC has taken early steps toward developing a human vaccine in case it’s needed, but that’s a standard procedure with all emerging diseases.