Fever in babies under 3 months is rare and can be a sign of serious illness or infection. If your baby is younger than 3 months and has a fever (38°C or above), or is between 3 and 6 months of age with a temperature of 39°C or above, you should seek advice from a healthcare professional.
However, if your child is older than 6 months the height of their temperature alone is not the most useful indicator of whether they are seriously ill – healthcare professionals use other signs and symptoms to assess how ill a child is. The signs and symptoms are assessed by healthcare professionals using The Nice Traffic Light Table (see link below).
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