When a person becomes infected by the SARS-CoV-2 virus, their immune system responds by creating antibodies as one of the ways to fight the infection. The immune system continues to produce such antibodies long after the infection has been cleared. Unfortunately, it is still not known just how long the body continues to make them; thus, discussions regarding when to administer booster shots have become heated in recent weeks. A possible way to reduce such discourse and to relieve the minds of patients, would be access to a cheap and readily available testing device that could measure the level of antibodies produced by a given individual. Such a device would also be able to report if a person had previously been infected with the SARS-CoV-2 virus, or if they had been vaccinated against it. In this new effort, the researchers in Hong Kong are claiming to have created just such a device.

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