The New York Times reports:
Researchers who have examined the genomes of two coronavirus infections in Washington State say the similarities between the cases suggest that the virus may have been spreading in the state for weeks. Washington had the United States’ first confirmed case of coronavirus, announced by the Centers for Disease Control and Prevention on Jan. 20. Based on an analysis of the virus’s genetic sequence, another case that surfaced in the state and was announced on Friday probably was descended from that first case.
The two people live in the same county, but are not known to have had contact with one another, and the second case occurred well after the first would no longer be expected to be contagious. So the genetic findings suggest that the virus has been spreading through other people in the community for close to six weeks, according to one of the scientists who compared the sequences, Trevor Bedford, an associate professor at the Fred Hutchinson Cancer Research Center and the University of Washington.
Read the full article.
Coronavirus May Have Spread in U.S. for Weeks, Gene Sequencing Suggests:
Two cases detected weeks apart in Washington State had genetic links, suggesting that many more people in the area may be infected.https://t.co/BcQjKaNFYU
— Julia Davis (@JuliaDavisNews) March 1, 2020