Explained: What are saliva tests and can they beef up our borders? 16 Feb, 2021 06:00 AM 6 minutes to read Saliva-based testing has been increasingly touted as a quick and simpler option for those who need regular checks. Photo / Supplied Saliva-based testing has been increasingly touted as a quick and simpler option for those who need regular checks. Photo / Supplied New Zealand's latest community cases have prompted calls for a wider roll-out of saliva testing, which health experts argue could be carried out daily on MIQ workers. What does it involve - and what is New Zealand already doing? Science reporter Jamie Morton explains.