James 2020.

Study characteristics
Study design	Mathematical modelling study Description: model‐free estimation of COVID‐19 transmission dynamics
Disease	COVID‐19
Travel‐related control measure(s)	Border closure and quarantine of travellers Date of implementation: 16 March 2020: 14‐day quarantine; 20 March 2020: border closure to non‐citizens and non‐residents, 10 April 2020: 14‐day mandatory government‐managed quarantine
Country implementing the measure(s)	Country protected by the measure: New Zealand Country restricted by the measure: n.r.
Outcome(s)	Cases avoided due to the measure Outcome 1: number of secondary infections caused by an imported case Outcome 2: probability of an imported case not causing any further infection Follow‐up: n.r.
Notes	COI: n.r. Funding: “This work was funded by the Ministry of Business, Innovation and Employment and Te Pūnaha Matatini, New Zealand's Centre of Research Excellence in complex systems.”