<qa>  What is a household contact defined as?- Note: A household contact is defined as a person who currently lives or lived in the same dwelling unit and shares or shared the same housekeeping arrangements and who reports exposure within the past two years to an adult index case with pulmonary TB. Shared housekeeping arrangements are defined as sleeping under the same roof as the index TB case for at least seven consecutive days during the one month prior to the index case TB diagnosis. 