A $25 Blood Test Could Detect Every Virus That’s Ever Infected You

You’ll probably remember the last time you had the flu, but what about that time you had measles – or was it chicken pox? Your blood knows: it keeps a record of every virus you’ve ever been infected with. A tiny drop of the stuff can now be tested to reveal a person’s viral history.

The test, called VirScan, reveals that adults around the world tend to have been infected by an average of 10 viruses over their lifetime. It could also be used to identify links between viral infections and mysterious diseases like chronic fatigue syndrome.

Source: Cheap blood test reveals every virus you’ve ever been exposed to

The article goes on to largely dismiss the use of the test, as the immune response takes time to build up the antibodies necessary to register an indication of infection.  And points out that we have established symptoms…