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When Should You Test for COVID After Symptoms Appear? New Research Has the Answer
Before you jump to take a COVID-19 test at the first sign of a symptom, take a moment to consider the strategy behind your timing.
A new study found that when a person is infected with COVID, their viral load is likely highest four to five days after their symptoms begin.
The research, published in the journal Clinical Infectious Diseases, implies that at-home antigen tests may not be useful before someone’s viral load is highest.
Using a test before peak viral load could increase the risk of a false negative.
“What we found was that on the fourth to fifth day of symptoms, your viral load is at its highest,” Jennifer Frediani, PhD, assistant professor at Rollins School of Public Health at Emory University in Atlanta and first study author, told Health.
“Since home tests can be less sensitive, if you only test on the first day of symptoms, your test could be negative because your viral load is lower than what a home test can detect,” she said.
That said, if you think you’re exp
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