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How long is your COVID vaccine good for? You can soon find out, thanks to a new test that informs patients of their immunity’s ‘magnitude and duration’

Until recently, it’s been nearly impossible to say. Immunity, whether from vaccine or prior infection, is thought to wane after three or four months, but it varies by person. That knowledge is based on what’s known about typical antibody response—but antibodies are only half of the picture. The other half: T-cell response, which hasn’t been examined in patients nearly as often owing to technical challenges. Now that response can be tested affordably and en masse, researchers at Mount Sinai Health System in New York say. Along with researchers at Duke-NUS Medical School in Singapore, they developed a rapid blood test called the dqTACT assay that measures the activation of such cells in response to COVID. The test will allow for mass monitoring of the population’s immunity and effectiveness of vaccines new and old, they said in a study published Tuesday in Nature Biotechnology.

Fortune - June 14, 2022

View the full story here: https://fortune.com/2022/06/15/how-long-is-your-covid-vaccine-good-for-new-test-t-cell-antibody-mount-sinai-health-system-new-york/