Well, officially it is Finnish-German production, but most of performers come from Finland and most events take place there as well (more precisely, in Lapland near the Artic Circle), so you get, above all, a picture how life in those harsh conditions go on and what potential dangers and risks can appear.
If/when some virus is included, then it is always "food for thought", but in the modern fast developing technology - you never know; what was unimaginable a decade ago, can be a reality now, etc. All in all, as "pure crime stuff" was included, I had nothing against this inclusion (usually I am not into non-human death inducers).
As for the cast, all main performers were unknown to me, but there was a strong and nice team-work, no character "shining" above or at the expense of others. It is more to my liking than the use of same actors-actresses in similar series, causing confusion or reducing the thrill if they tend to play similar roles as well.
Based on the ending scenes, I am looking forward to the potential Season 2.