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A 18-year-old male asked:

Do viral infections show up on a full blood count, i got told they never?

2 doctor answers2 doctors weighed in
Dr. Dahlia Philips-Rodriguez
Infectious Disease 17 years experience
Depends: A wide array of viruses exist. Some can cause abnormal blood work. It is really depending on which virus you are concerned about.
Dr. Michael Ein
Infectious Disease 48 years experience
See below: Depending on the infecting virus patients with viral infections sometimes have a decreased white cell count and platelet count. Sometimes there are an excess of lymphocytes on the WBC differential and sometimes the lymphocytes are atypical. Often the complete blood count is normal.

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Last updated Jan 28, 2020

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