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But then the results got really interesting. In a few cases, the immune systems of unhealthy and healthy people looked similar, with some people appearing near the “healthy” area of the chart even though they were known to have diseases. Most likely this was because their symptoms were in remission and not causing an immune reaction at the moment when their blood was drawn, Tsang told me.
In other cases, people without a known disease showed up on the chart closer to those who were known to be…
