WASHINGTON, Oct 2 (Reuters) - As many as 80 people were in contact with the Dallas Ebola patient at some point, Texas health officials told NBC, marking a significant jump from the 18 people authorities had said may have been exposed to the deadly virus. Additionally, four members of the patient's family have been ordered to stay home as a precaution even though they are not showing symptoms, the Texas Department of State Health Services said in a statement. The health officials said 80 people may have come into contact with Duncan, NBC reported.