Rt Hon JACINDA ARDERN: We are using saliva testing. I'd point out, as well, that in the use of that saliva testing, of course, there are some jurisdictions, some areas, where we've created it as an opportunity to be used, and some have chosen to use the nasal swabs instead, but it is available and it is being used. Antigen is increasingly being used in health settings as well, and we anticipate in the future it will be used more often as part of some of our contact tracing and isolation processes for vaccinated individuals, to perhaps reduce down the need to have prolonged periods of time in isolation. 