The number and proportion of influenza-positive laboratory tests has again increased over the past four weeks. In week 7, the proportion barely reached the high level.
The number of medical consultations for influenza in Norway has increased in recent weeks, but is still at a low level, 1.5 percent.
There may yet be further increase in influenza activity, writes the Institute of Public Health in its weekly report.
So far this season there has not been one clearly dominant virus. The two most common influenza viruses have been A subtype H3N2 and influenza B, genotype Victoria.
The western region had the highest influenza-like illness, with 1.8 percent, while the northern region was the lowest, with 1 percent. The share doubled in the southern region over the past three weeks, to 1.4 percent.
Five outbreaks of influenza have been announced at health institutions so far this season. After some stagnation that is fairly typical for the weeks following the New Year, flu viruses are now rising again.
© NTB Scanpix / #Norway Today