Nearly two weeks after being hospitalized for a mysterious illness, the health of a 4-year-old Forsyth County boy appears to be improving.Forsyth County Sheriff's Major Dan Jagoe said the child, whose name has not been released, is stable but still in intensive care at Children's Hospital of Atlanta at Egleston. The boy was hospitalized Feb. 28, after his mother reported that he was unresponsive and having respiratory problems. He was originally listed in guarded condition, which is worse than critical, authorities said.Hours later, the boy's twin brother started showing similar symptoms.