What's the name of the rain virus movie?

Rainy Days is a TV series directed by Kenneth Kanez and starring Micol Folsz Gard.

Ten years ago, a cruel bacterial attack wiped out most of Scandinavia's population, and a young brother and sister began their journey to find a safe place. The only guide for the brother and sister is their father's diary, which records the bacteria and the dangers of the new world. They joined other young survivors and started a dangerous cross-border trip. Faced with fatal disasters, these people must quickly realize that the greatest danger comes not from the outside, but from the inside.