— iHealth — $14 for a two-pack at the company's website.
— QuickVue — $20 to $24 for a two-pack at local pharmacies.
— BinaxNow — about $24 for a two-pack at local pharmacies.
— CareStart — $24 for a two-pack at RiteAid.
— BD Veritor — $26.50 for a two-pack at Amazon.
— Inteliswab — $29 to $40 for a two-pack from medical supply stores online.
— On/Go — $35 for a two-pack at Amazon, Walmart and the company's website.
One other antigen test, by Celltrion, is available in bulk quantities from medical supply stores online for about $10 per test.
Different antigen test kits come with different features — for example, some have smartphone apps that can display your test result, which would be useful if you're asked to show proof of a negative test. And the performance of the tests may vary, although all did well enough to win the FDA's emergency authorization.
Dr. Ashish K. Jha, dean of the Brown University School of Public Health, said the BinaxNow test has been the most widely used, so it has more of a track record than the other tests. But he said people shouldn't pay too much attention to brand names, given that the tests have been in relatively short supply. "Any of the tests that you can find are way better than not having tests," he said.