The number of people in Wales taking up free flu jabs is lower than in England, Ireland and Scotland.
Only half the people who are classed as most at risk of getting serious complications are protecting themselves from it.
Now doctors here are calling for more people to have a flu vaccination.
Our Health Correspondent Mariclare Carey-Jones has been investigting
More top news
The MET Office has issued a Yellow 'Be Aware' warning for strong winds and gusts of 60-70mph on exposed coastal areas
Breezy with further showers, locally heavy, spreading in from the west at times.
Breezy, but winds gradually easing overnight. There will be clear spells and isolated showers through the evening.