Health officials are urging people to do all they can to protect themselves and stop the spread of flu as recent figures show cases of the illness are rising in Wales.
Visits to GPs, hospital admissions and admissions to intensive care units of confirmed cases of influenza have all increased across Wales in the last few weeks.
The most recent figures, as of first week of January 2016, show that 51 patients have been confirmed to have flu since October 2015, when the first case was diagnosed, and nine of these cases have been admitted to intensive care units in Wales.
Officials say that not everyone who has symptoms of flu will be tested, which means the actual number of people who have had flu is likely to be a lot higher.
More than 2,400 people have also visited their GP with flu-like symptoms in Wales already this winter.
All age-groups have been affected, although young children, the elderly and adults with chronic conditions are particularly vulnerable.
Public Health Wales is urging those in ‘at risk’ groups to get their free flu vaccine to protect themselves against the illness, and for all those with symptoms to take measures to prevent the spread of flu.