Where Do New Virus Strains Come From

Humans have always come into contact with new viruses as they have explored new areas and spread across the globe. Experts are pretty sure this is precisely what happened with the current COVID-19 coronavirus which is why on January 30th China issued a temporary ban on the trade of wild animals.

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Viruses or other pathogens have a natural tendency to keep on changing and mutating.

Where do new virus strains come from. Despite the emergence of these new strains of the SARS-CoV-2 virus the current slate of vaccines still appear to be overwhelming game-changers in the fight against COVID-19. The Delta variant originated in India which suffered a. Researchers have preliminary evidence that some of the new variants including alpha seem to bind more tightly to our cells Bollinger says.

The specimen came to be known as the Beaudette strain. Hudson and Fred Robert Beaudette cultivated the virus for the first time in 1937. Researchers have estimated that the Delta variant is about 50 percent more contagious than the Alpha original variant.

Often a spillover or zoonotic virus gets help from a middleman species called an amplifier. These proteins help the virus attach to human cells in the nose lungs and other areas of the body. Viruses often mutate or develop small changes as they reproduce and move through a.

Other viruses change more slowly as mutations in their genes gradually accumulate over time a process known as antigenic drift. The various birds mammals and reptiles host viruses that can jump species and rapidly mutate even potentially infecting humans. Influenza is a virus thats spread from person to person.

As the COVID-19 pandemic continues new variants of the SARS-CoV-2 virus pop up and some lead to increasing infections. In the late 1940s two more animal coronaviruses JHM that causes brain disease murine encephalitis and mouse hepatitis virus MHV that causes hepatitis in mice were discovered. While current vaccines might have slightly less efficacy when pitted against new mutations preliminary data suggests that they may still be largely effective at protecting people from infection.

New influenzas for example often start in wild waterfowl. However in some cases the variants can be genetically distinct which makes them more dangerous. This phenomenon is called genetic shift and is often the cause of new and more virulent strains appearing.

The main new variantsnamed Alpha Beta and Gamma and first identified in Britain South Africa and India respectivelyhave properties that make them more successful in transmitting and replicating than the. Sometimes a virus might hitch a ride on whats known as a vector often an insect to get from host to human. For example in 2003 a virus in the Coronaviridae family jumped from an animal reservoir believed to be horseshoe bats to humans causing a highly pathogenic disease in humans called severe acute respiratory syndrome SARS.

As per scientists the new variants of a virus come up when there is a change in the genetic code of the virus which is also known as the process of mutation. But increased human activity in. This appears to make some of these new strains stickier due to changes in the spike protein.

New variants have been seen almost since the virus was first detected in China nearly a year ago. Viruses that infect animals can jump from one species to another causing a new usually severe disease in the new host. How far has it spread.

The team used the model to test several hypotheses about why antigenically new seasonal flu strains tend to emerge from this part of the world including. Mosquitos that spread West Nile virus from birds to people are an example. It originates actually among birds and other animals such as pigs and new viral strains of influenza come to this country and to Europe.

85 percent of Asias population lives in tropical or subtropical regions with no distinct winter allowing continuous transmission of endemic flu strains and more opportunities for evolution of new strains. It is thought the variant either emerged in a patient in the UK or has been imported from a country with a lower ability to monitor coronavirus mutations. The variant first seen in South Africa called B1351 or 501YV2 was reported for the first time in the US Thursday in South Carolina.

The variant can be. On Saturday Marylands governor announced a sample from. June 9 2021.

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