Risk of transmission of SARS-CoV-2 on international flights, a retrospective cohort study using national surveillance data in England.

"Declarations Ethical statement and consent to participateData were originally collected for contact tracing and health protection purposes and fall under Regulation 3 of the Health Service (Control of Patient Information) Regulations 2002. Ethics approval obtained from the United Kingdom Health Security Agency Research Ethics and Governance Group: reference ‘R&D 509’, who confirmed that informed consent could be waived due to the retrospective nature of the data and the health service regulations. Consent to publishNot Applicable (NA). DisclaimerThe authors alone are responsible for the views expressed in this article and they do not necessarily represent the views, decisions, or policies of the institutions with which they are affiliated. Conflict of interestNone declared. Conflict of interest None declared."

"Funding No external funding supported this work."