Health Care

USA covid cases found as early as December 2019, says study

USA covid cases found as early as December 2019, says study”

"These findings also highlight the value of blood donations as a source for conducting SARS-CoV-2 surveillance studies", the report states.

The study published Monday identified 106 infections from 7,389 blood samples collected from donors in nine USA states between December 13 and January 17.

Then, it wasn't until January 9 that China announced to the world that it had mapped the coronavirus genome, but in the following week, Wuhan health officials insisted that no new cases had been discovered.

The CDC previously analyzed seroprevalence - the presence of a virus in a population based on blood samples - in 10 different cities and states last spring and found the actual numbers of people infected with the virus was actually between two and 13 times higher than was previously confirmed through positive test results.

More news: Samsung Considers Discontinuing Galaxy Note Smartphones

In July CDC shortened, from 14 days to 10, its advice on how long a person should stay in isolation after they first experience COVID symptoms - provided they're no longer sick.

The revelations in the paper by researchers from the CDC reinforce the growing understanding that the coronavirus was silently circulating worldwide earlier than known, and could re-ignite debate over the origins of the pandemic.

Some reports have suggested the introduction of SARS-CoV-2 into the United States may have occurred earlier than initially recognized, though widespread community transmission was not likely until late February, according to the study.

"These specimens were previously archived for potential future studies to identify emerging transfusion-transmissible infections but were re-purposed for the present study", researchers stated. Although they detected antibodies, that does not mean they are "true positive" COVID-19 tests.



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