Table 2 Household definitions

Household

 Two or more people (not necessarily related) living at the same address in North West England or Wales who share cooking facilities and share a living room or sitting room or dining area [29]

Household member

 A person who normally resides in the household and regularly shares food or toilet facilities (Public Health England, 2017b)

Household contact

 A household member in a home where an index case has been identified

Household with transmission

 A household that has at least one additional household case

Household without transmission

 A household that has one case (the index case)