The electronic data is properly part of one's medical records, which should not be accessible by anyone other than your medical providers. Breaching that limitation on medical data is a violation of the 4th Amendment.  The cards are one thing - but further down the article it sates that they are also entering the information into a centralized CDC database.  Not good. You'll be sad to know that all our medical data has been digitized for electronic health records (EHR) and is being shared internationally...anonymously, of course ;-)