The test was ideal in identifying the 84 negative samples, but also gave negative results to 20% of the true positives.
An antigen test is a new type of diagnostic test designed for rapid detection of the virus that causes COVID-19.
Former U.S. Food and Drug Administration (FDA) commissioner Dr. Scott Gottlieb in an interview on Face the Nation Sunday said the first antigen test to discover COVID-19 was a "game changer". The positive results from the test are "highly accurate", the FDA said, but there are more false negative results. Quidel claimed its test can provide accurate, automated results in about 15 minutes.
One type are polymerase chain reaction (PCR) tests, a molecular diagnostic testing technique that detects the genetic material from the virus and can help diagnose an active COVID-19 Coronavirus infection.
The emergency use authorization was issued on May 8 to Quidel Corporation for the Sofia 2 SARS Antigen FIA.
US regulators have approved a new type of coronavirus test that administration officials have touted as a key to opening up the country. The tests can only be carried out in CLIA approved high and complex laboratories. The FDA's emergency authorization "allows us to arm our health care workers and first responders with a frontline solution for COVID-19 diagnosis, accelerating the time to diagnosis and potential treatment", Douglas Bryant, CEO of Quidel, said in a statement.
Dr Deborah Birx, a member of the White House Covid-19 task force, said in April that a "breakthrough innovation" in antigen testing was needed to speed reopening of the USA economy.
The antibody test is to determine the presence of the bodys immune response or antibodies and is administered via a fingerpick blood sample.
Get all the latest news on coronavirus and more delivered daily to your inbox.
"These antigen based tests aren't as reliable, meaning they're not as sensitive".
Oil prices rally as Saudi Arabia pledges additional cut
That's as oil revenues in the period fell by nearly a quarter from a year earlier to $34bn, pulling down total revenues by 22%. Mohammed al-Jadaan, Finance Minister, explained that government's decision was to support stability of non-oil revenues.