The new #SARSCoV2 variant we identified recently, 20A.EU1, has jumped to New Zealand a few times (& been caught in quarantine) - but this interesting preprint shows how it seems to have transmitted in-flight, from individuals originating in Switzerland:
https://research.esr.cri.nz/articles/preprint/A_case_study_of_extended_in-flight_transmission_of_SARS-CoV-2_en_route_to_Aotearoa_New_Zealand/13257914

Just for the avoidance of all doubt (I know I've been covering a lot of stuff lately!) this isn't linked to mink/Denmark, but the variant that's currently most prevalent in Europe, spread through summer travel. You can read more about it here: https://twitter.com/firefoxx66/status/1321725353371586560

This preprint was made possible by a long list of great people - unfortunately I do not know twitter handles for them all - but it was led by Tara Swadi & Jemma Geoghegan & involved @hamesjadfield @alexeidrummond @edwardcholmes & @Joepdl

This paper also highlights a critical point: while 20A.EU1 may have originally expanded in Spain, it has certainly spread from other European countries since then.
If you can't cut the transmission chain of a variant in your own country, you become the next 'source'.