Table 1.

Categorisation and number of identified contacts of Case 1 and Case 2 (numbers do not include Case 2 as an identified contact of Case 1)

Category	Description	Follow-up	Self-isolation	Number of identified contacts
A	Household contact – living or spending significant time in the same household	Active follow-up for 14 days after last exposure	Yes	1
B	Persons in healthcare settings (e.g. healthcare workers, visitors) who have not worn recommended PPE or laboratory workers who have not used appropriate laboratory precautions	Active follow-up for 14 days after last unprotected exposure	Yes	2
C	Persons in healthcare settings who have worn recommended PPE	Passive follow-up for 14 days after last exposure	No	43
D	For any other (non-aircraft) exposure not satisfying categories A-C: Direct contact or face-to-face contact with case, e.g. talking, being coughed on for any length of time	For exposures in this category without recommended PPE: Active follow-up for 14 days after last unprotected exposure. For exposures in this category with recommended PPE: Passive follow-up for 14 days after last exposure	Active follow-up group: Yes Passive follow-up group: No	6
Total contacts:				52