The Chief Medical Officer for Wales, Dr Ruth Hussey, launches the seasonal flu campaign today.
It is hoped that more people will be encouraged to take up the jab, especially those in 'At Risk' groups and people aged 65 and over.
People in 'at-risk' groups are offered the injection currently, but the take-up is lower in Wales than the rest of the UK.
More top news
Most places will see a dry, bright day with patchy cloud but also some warm sunny spells, and it'll be less breezy than on Friday.
Members of the RMT union are walking out for three days from today in a row over new trains causing disruption to bank holiday services.
The Bank Holiday is here! Which is usually a recipe for wet weather! Yes, we will get our fair share. But it's not all doom and gloom!