Vaccines such as the flu jab and the COVID booster trigger a normal, temporary immune response, which can briefly affect inflammation markers (such as hs-CRP), white blood cell counts, and ferritin.
For the most accurate results, we recommend taking your blood test either before your vaccine or at least 2 weeks afterwards.
Most other markers, such as cholesterol, HbA1c, thyroid, vitamins and hormones, are not affected.
If you take a vaccination in the 2 weeks before your test, we recommend that you note this in your Supporting Information questionnaire at my.medichecks.com. This can help our reporting doctors consider this when reviewing your results.
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