The city of Houston, Texas could furlough all of its employees except for police and firefighters, Mayor Sylvester Turner said at a news conference on Tuesday.
New genetic analysis shows coronavirus quickly spread around the world starting late last yearA new genetic analysis of the virus that causes Covid-19 taken from more than 7,600 patients around the world shows the virus has been circulating in people since late last year, and must have spread extremely quickly after the first infection.
Researchers in Britain looked at mutations in the virus and found evidence of quick spread, but not evidence the virus is becoming more easily transmitted or more likely to cause serious disease. “The virus is changing, but this in itself does not mean it’s getting worse,” genetics researcher Francois Balloux of the University College London Genetics Institute told CNN.Balloux and colleagues pulled viral sequences from a giant global database that scientists around the world are using to share data. They looked at samples taken at different times and from different places, and said they indicate that the virus first started infecting people at the end of last year.
“Our results are in line with previous estimates and point to all sequences sharing a common ancestor towards the end of 2019, supporting this as the period when SARS-CoV-2 jumped into its human host,” the team wrote in the report, published Tuesday. “It’s very recent,” Balloux said. “We are really, really, really confident that the host jump happened late last year.”The researchers also found genetic evidence that supports suspicions the virus was infecting people in Europe, the US and elsewhere weeks or even months before the first official cases were reported in January and February.
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