Dedic, who plays professionally for the German Bundesliga club, was forced to miss Sunday's match against Hamburger SV because of fever and has been hospitalised since.
According to Bochum, the 25-year-old striker will be able to return to training already at the beginning of next week.
This was confirmed by Dedic, who told commercial station POP TV that he feels "much better".
"I expect to be out of hospital in two days... This was probably the price I had to pay for everything," said Dedic in a reference to the massive celebrations following Slovenia's stunning entry to the World Cup.
Club physician Karl-Heinz Bauer added that Dedic had been hit by the new flu virus at the last week's game against Russia in Maribor.
Trailing Russia 1:2 after the first leg of the play-offs, Slovenia qualified on Wednesday for its second-ever World Cup through Dedic's goal in the 44th minute.
The aggregate score was 2:2, which allowed Slovenia to eliminate the Russians on the away goals rule.
