She writes further:
"It's very unlikely that I'll compete at all this week".
"I'm devastated about this, but the only thing I can do now is focus on resting".
This week's competitions in Antholz, Italy, are the last before the World Championship – but now it's almost certain that the total third in the World Cup won't start in Thursday's sprint.
She doesn't feel completely well, says the Swedish national team's press officer Emma Höglund to DN in connection with Wednesday's training.
"A hard blow"
Hanna Öberg says it's sad that her sister won't be joining her on the tracks.
It's a hard blow for her, considering the ambitions she has in the total.
When asked if they've been in contact during the past few days, she answers that they skied a few laps yesterday.
But it was outdoors, so I hope I didn't catch anything.
"Not self-evident"
The Öberg sisters don't share a hotel in Italy. At the same hotel where Elvira is staying, Sebastian Samuelsson is also staying – who isn't worried about catching anything.
It feels very calm. Since I have my family here, we've kept a bit of distance as much as possible, he says and continues:
It means a lot that they're here. Because it's not self-evident that it works. So it's valuable.
In three weeks, the Biathlon World Championship will begin in Lenzerheide, Switzerland.