Wales is seeing the biggest seasonal flu outbreak for more than a decade.
The number of cases of infection, including H1N1 swine flu, have gone up by almost 50% in the past week and rates here are currently above those in England.
The number of cases of influenza reported to GP’s in Wales has risen from 85 cases per 100,000 last week to 92 per 100,000.
Provisional results show that people aged 25-34 are most at risk. Doctors say they expect the numbers to peak later this week.
Public Health Wales say people in act risk groups, including the elderly and pregnant women, should get the flu vacine.
The Welsh Assembly Government say people with flu symptons should avoid A&E and call their GP’s surgery before arriving for an appointment.
Experts believe the number of schoolchildren catching flu could change when they return to school following the Christmas break.
However the increase in cases still falls short of epidemic levels, which experts define as 200 cases per 100,000.