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. 1999 Jan-Feb;4(1):73–76. doi: 10.1093/pch/4.1.73

TABLE 3:

Definition of close household contact

  • More than 4 h a day or

  • 20 hours a week of contact or

  • Sharing sleeping arrangements or

  • Having direct mucous membranes contact with oral or nasal secretions within seven days of illness of index patient