First Human Victim of H5N5

> The deceased was an older adult with underlying health conditions, according to the DOH.

> The deceased had a backyard flock of mixed domestic birds, and the Department of Health's sampling found avian influenza virus in the flock's environment, according to DOH.

> This suggests that exposure to domestic poultry, their environment, or wild birds was the most likely source of the infection, health officials said.

Analysis is hard.