Cytokines responsible for long hauler. Imagine th
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“We need a reliable and objective way of saying whether someone has had COVID-19,” says study co-leader Dr. Mark Wills of the University of Cambridge. “Antibodies are one sign we look for. But not everyone makes a very strong response and this can wane over time and become undetectable.”
The new technique is based on chemicals called cytokines that control blood cells. When released, the tiny proteins trigger the immune system’s T-cells to fight foreign invaders.
https://www.studyfinds.org/long-covid-blood-test/