iJMorgannn
2021-06-18T20:17:21+00:00
为什么不检更早的2019年10月到12月份的血样？
[img]https://img.nga.178.com/attachments/mon_202106/21/-7Q2o-aq8wZgT3cSgo-go.jpg.medium.jpg[/img]
The blood samples were collected between Jan. 2 and March 8, 2020, and were analyzed with two different antibody tests that have emergency use authorization by the U.S. Food and Drug Administration. Confirming the findings with two tests instead of one helped minimize false positive results, the researchers said.
Coronavirus antibodies were detected in nine of the 24,000 samples, all of which belonged to people living in areas outside Seattle and New York City, where scientists believed the coronavirus first entered.
For example, a person in Mississippi who had COVID-19 antibodies donated their blood on March 6, but the first confirmed case in that state was reported five days later. In Illinois, a coronavirus antibody positive sample was donated on Jan. 7, yet the first confirmed case didn’t come for
another 17 days, meaning the virus may have been in the state as early as Dec. 24, 2019, according to the study.
[img]https://img.nga.178.com/attachments/mon_202106/21/-7Q2o-aq8wZgT3cSgo-go.jpg.medium.jpg[/img]
The blood samples were collected between Jan. 2 and March 8, 2020, and were analyzed with two different antibody tests that have emergency use authorization by the U.S. Food and Drug Administration. Confirming the findings with two tests instead of one helped minimize false positive results, the researchers said.
Coronavirus antibodies were detected in nine of the 24,000 samples, all of which belonged to people living in areas outside Seattle and New York City, where scientists believed the coronavirus first entered.
For example, a person in Mississippi who had COVID-19 antibodies donated their blood on March 6, but the first confirmed case in that state was reported five days later. In Illinois, a coronavirus antibody positive sample was donated on Jan. 7, yet the first confirmed case didn’t come for
another 17 days, meaning the virus may have been in the state as early as Dec. 24, 2019, according to the study.