As doctors and hospitals in the UK struggle to deal with a flu epidemic, Brits are being warned that the current outbreak is expected to intensify in the new year as the potentially fatal Australian strain of influenza spreads across the country.
Experts say older people are particularly vulnerable to the flu and the H3N2 Brisbane 10 flu strain which killed six children in Australia and caused a severe epidemic is spreading within the UK and Ireland, Bulgaria and Spain are also under pressure from the virus - another 11 countries are also affected.
The current flu epidemic is well on the way to being the worst in eight years and experts expected it to peak between January and March.
There has been a sharp increase reported in the number of flu-like illnesses over the past two weeks, with seniors the worst-hit and the health service has been struggling to cope over the Christmas period - among the over-65s, 45 in every 100,000 people now have flu, up from just 18 a week ago - the elderly are the most likely to die from flu.
Doctors surgeries have been closed over the holiday period and sufferers have had to resort to hospital accident and emergency departments for help, many of which were already under increased pressure because of outbreaks of the winter vomiting bug norovirus.
Though it is still the 15 to 44 age group who are reporting the most cases, with a rate of 80 per 100,000, it is the elderly are most likely to die from flu.
This year's outbreak is on course to be the worst since 1999, when 22,000 people died - an outbreak does not become an epidemic until the rate is higher than 200 per 100,000.
Experts say older people often have the most serious consequences with the lungs put under increased pressure and the threat of viral pneumonia and the increased risk of contracting a second bacterial infection - also vulnerable are those with heart problems, diabetes or asthma and those whose are immune systems are compromised.
They say the influenza vaccination programme has been good in some areas but patchy in others but most people with flu would not need to see a doctor and would be fine within two or three days.