Last month, state health officials detected bird flu in a backyard flock in Jackson County, plus two commercial poultry facilities in Ottawa County.

Two people are sick in Oakland County and nine others are being monitored after they had contact with H5N1 bird flu from an infected backyard flock.

The Oakland County Health Division is monitoring 11 people who had direct contact with the infected flock; two have flu-like symptoms and are in isolation, said Bill Mullan, county spokesman.