An enlarged view of the adeno virus that causes the common cold.
DNA analysis of the slotxoadenovirus found in 31,600-year-old baby teeth fossils suggests the virus that causes the common cold today. It may have been born on Earth 700,000 years ago, while the modern human race, or Homo sapiens, may have emerged at least 400,000 years later.
A team of researchers from Denmark The UK and Russia published the results of the study in the online academic archive, biorxiv.org, saying they had extracted all of the virus's genetic material. Or two copies of the virus genome from the fossilized baby teeth of two children ages 10-12, who these homo sapiens used to live in the Arctic. Russia's Yana River area during the last pre-ice age
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The results of the analysis of the virus genome It was found to be human adeno virus type C (HAdV-C), a virus that still exists today. It usually spreads by season. and cause mild flu symptoms in children
Sophie Nielsen, lead researcher, a doctoral student at Denmark's University of Copenhagen. said that the virus can enter the teeth through the bloodstream which is strong tooth tissue and does not regenerate like bone This makes it possible to preserve the virus particles that have slipped into them very well. The cold weather in the Arctic also helps to preserve the DNA of the virus.
A simple cold can be accompanied by a mild fever, cough, and sneezing.
However, the two viral genomes are distinct substituents of adeno C viruses, HAdV-C1 and HAdV-C2, with little to no genetic variation in the current two subspecies. distorted
Discovery of two virus subspecies coexisting in the same era It was assumed that they were born and evolved separately. Since hundreds of thousands or millions of years ago, it has already entered the baby teeth of ancient children. The research team estimates that it was at least 700,000 years ago.
Modern humans are considered the latter of this virus. Because there is currently evidence indicating that Homo sapiens may have originated on Earth about 300,000 years ago.
However, the researchers pointed out that the time period for the two subspecies of the adenovirus C was formed. It is an approximation that may still have high inaccuracies. Because there are few viral genome samples to compare. But viral genetic analysis of fossil samples of many eras and regions in the future will help to verify the correctness