Families across Dorset have been cautioned about an increase in winter illnesses during the half-term break.
The NHS is encouraging families to ensure they know how to get the right care if they or their children become unwell.
This helps to avoid unnecessary visits to emergency departments.
There are flu and COVID-19 vaccination clinics available throughout the holidays for those eligible.
Dr Paul Johnson, chief medical officer for NHS Dorset ICB, said: "Children often pick up coughs, colds and other bugs once the weather turns.
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"Knowing where to go for help means you can act quickly and avoid unnecessary trips to busy emergency departments.
"Keeping up to date with vaccinations is one of the best ways to help keep your children and family safe this winter."
Many pharmacies are open in the evenings and at weekends, and are running special walk-in flu clinics for two and three-year-olds.
Flu and COVID-19 vaccination walk-in clinics are open during the half-term holiday for eligible groups, including older children, teenagers and adults at higher risk.
The NHS also advises on simple steps to help prevent the spread of germs, including maintaining good hand hygiene and covering coughs and sneezes.
For more information, visit staywelldorset.nhs.uk.