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Changes in the heparin neutralising activity of platelet poor plasma after immunisation.
  1. I A Baker,
  2. C H Howells,
  3. J R O'Brien

    Abstract

    Acute myocardial disease, which may be associated with abnormal platelet activity, has been reported after routine immunisation. Thirty-two army apprentices undergoing immunisation were studied for changes in the heparin neutralising activity (HNA) of platelet poor plasma. HNA increased after immunisation. This increase in HNA may represent an increase in platelet activation but may also relate to changes in acute phase proteins. These changes were not observed in elderly subjects undergoing immunisation with influenza vaccine.

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