potentially happen in the first few days of a COVID-19 infection, rapid tests are still worth having and using. Since the Omicron variant in particular replicates so quickly, you could have a negative result in the morning and a positive result by the afternoon, according to Dr.
Piltch-Loeb. If you're not sure, consider taking two tests. “If you test positive on a rapid antigen test—especially two in a row—you are infectious and should begin your isolation,” she says. “It is not necessary to follow up a rapid result with a PCR result to confirm your positivity unless you are required by an employer or other entity.”While you can get over-the-counter tests at pharmacies, they're also available online; you might also be able to get free tests through your local health department.
To make sure you're getting one that's legit, the (FDA) has given emergency use authorization (EUA) to a number of manufacturers to create and sell these rapid test kits to detect SARS-CoV-2, so .