If you ordered COVID tests, heed this warning.
If your USPS package arrives while your area is undergoing freezing temperatures, there are a number of things you can do to"ensure appropriate test performance," according to the FDA. The agency says you should first bring the package inside your home and leave it unopened at room temperature for at least two hours. Once this allotted time has gone by, your package should be good to open and use.
"As long as the test line appear as described in the instructions, you can be confident that the test is performing as it should," the FDA explains."If the line do not appear in the correct location and within the correct time as shown in the test instructions when you perform the test, then the results may not be accurate, and a new test is needed to get an accurate result."Many households across the U.S.
"If they are not kept in that range, what can happen is there are proteins in the liquid that can break down, which is called denaturing, and can become denatured. So we need to be careful with that," Grannis said."When liquid freezes, it creates ice crystals and those ice crystals can do a lot of damage to the proteins in there, and heat can do the same."
This liquid is usually contained in a pouch or container. If it frozen, it can create a false negative result, according to Grannis."If the liquid freezes, the advice is not to use it because it's likely defective," he warned.frozen more than once ."Avoid using after multiple freeze-thaw cycles; based on manufacturer information so far, we think it is likely the tests will work after one freeze cycle," Zink tweeted on Jan. 20."If you are ill and the test is negative, consider getting a different test."
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