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Why test for frequent infections?
Picking up infections often, or taking a long time to recover, can have many causes, including stress and poor sleep. Blood tests can look at white blood cells, which fight infection, and at nutrients such as vitamin D, iron and zinc that support normal immune function.
Recommended tests
Full blood count
Compare pricesMeasures white blood cells and checks for anaemia
White blood cells
Neutrophils
Lymphocytes
Haemoglobin
Vitamin D
Compare pricesVitamin D supports normal immune function and is often low in UK winters
25-OH vitamin D
When to see your GP
See your GP if you need antibiotics repeatedly, have infections that keep returning, persistent mouth ulcers, or swollen glands that do not go down.
Why test for frequent infections?
Symptom-led matching
See the tests commonly used to investigate this symptom
UKAS accredited labs
Every listed provider uses UKAS-accredited UK laboratories
Clear turnaround
Typical result times shown alongside price and biomarker coverage
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