AKB48 Team B Kenkyuusei Otake Hitomi will be limiting her activities due to a fractured rib caused by a cough. 

An announcement was posted on the group's official blog stating, "Due to a cough from a cold, she had been experiencing pain in her side. After going to the doctor, she was diagnosed with fracture of the right 10th rib." As such, Otake must "limit her activities as she requires rest for the time being." 

Finally, the announcement said, "We are sorry to her fans for causing you to worry." 

Source & Image: Oricon