During the House Oversight Committee discussion on the novel coronavirus response in March, the director of the U.S. Centers for Disease Control and Prevention also mentioned some flu deaths in the U.S. were actually COVID-19 patients. But hospitals just failed to test them.
Identifying COVID-19 antibodies is very important in helping doctors determine how widely the virus has spread and identify who has developed an immune response. Test results will also help scientists in vaccine development.
The U.S. Food and Drug Administration (FDA) on Friday issued its first emergency use authorization for the COVID-19 antibody test, a serology test that can identity past infections but might be less effective on recent ones.
Since it usually takes three to five days for the body to develop antibodies after infection, the results previously were not suggested by the FDA as the criteria to definitively diagnose coronavirus.
Speculations around the exact time the novel coronavirus has circulated in each country are everywhere. Italy, the U.S., Britain, Brazil and many other countries all have reported strange pneumonia cases in December, November, and even in late October.