Any beta testers?
This hour:
White House press secretary Jen Psaki confirmed Tuesday that the government website to order free Covid-19 tests is up and running as part of a "beta phase" ahead of the government website's formal rollout Wednesday morning.
"COVIDtests.gov is in the beta phase right now, which is a standard part of the process typically as it's being kind of tested in the early stages of being rolled out," Psaki told reporters at the White House. "It will officially launch tomorrow morning."
I haven't tried to order any tests from the federal website because I don't want to compete for the government-subsidized antigen tests with households that can't afford to buy them on the open market.
Having said that, it is important to understand that a positive result from an antigen test really is useful only for determining if the subject has a sufficiently advanced infection to potentially be shedding virus.
As far as I have been able to determine—admittedly, I have no expertise in virology or epidemiology—if you do get a positive from an antigen test it is strong evidence you are shedding virus and you should quarantine yourself immediately to avoid infecting others. However, I haven't come across any evidence that a negative result from these tests yields any particularly actionable information. In addition to having a fairly high rate of false negatives (I've seen estimates of 10-15 percent but I'm not certain anybody really knows), they are not sensitive enough to detect infections during incubation or toward the end of the infection.
For reliable information regarding whether you are infected or not, it appears you need a molecular test: one that collects a swab from the subject, amplifies the sampled RNA, and uses the RNA sample to identify the SARS-CoV-2 virus if it is present. Here in the United States, the federal Food and Drug Administration has issued
Emergency Use Authorizations for at-home molecular tests which reportedly are roughly equivalent in accuracy to the
PCR tests that require laboratory analysis. (Multiple sequential tests taken 24-48 hours apart reportedly should be used to get the most reliable results.)
A table that includes molecular home tests which currently are approved for use in the United States
is available at this link. String search on "Home Collection" and—as always—exercise reasonable diligence before ordering any product.