Facebook bans ads with false claims about new virus
Facebook said Wednesday that it is banning ads that make false claims about products tied to the new coronavirus.
Feb 27, 2020
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Internet
Facebook said Wednesday that it is banning ads that make false claims about products tied to the new coronavirus.
Feb 27, 2020
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Business
Airlines operating in the Asia-Pacific region stand to lose a combined $27.8 billion of revenue this year in the ongoing coronavirus crisis, the International Air Transport Association said on Thursday.
Feb 20, 2020
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Business
French-Dutch airline Air France-KLM said Thursday the coronavirus has blown a large hole in 2020 earnings to date while separately unveiling lower profits for 2019.
Feb 20, 2020
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Business
Indian-owned Jaguar Land Rover is rushing through deliveries of small car parts to Britain from China, where supply chains are hit by the deadly coronavirus, the Financial Times said Wednesday.
Feb 19, 2020
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Business
The new coronavirus outbreak could mean a $4-5 billion drop in worldwide airline revenue, the International Civil Aviation Organization said on Thursday.
Feb 14, 2020
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Business
Boeing issued a stark warning Wednesday about the impact of the deadly coronavirus outbreak, saying there was "no question" it would hammer the aviation industry and the broader economy.
Feb 12, 2020
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Business
Automakers are considering whether to resume operations in China amid efforts to contain a virus outbreak while the impact on other companies spreads.
Feb 5, 2020
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Business
Global business is catching a chill from China's virus outbreak.
Feb 4, 2020
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Business
South Korea's largest automaker Hyundai Motor will suspend all domestic production because of a lack of parts due to the coronavirus outbreak in China, it said Tuesday.
Feb 4, 2020
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Business
Hyundai Motor, South Korea's largest automaker, suspended the domestic production of its flagship sport utility vehicle this weekend as a result of a supply disruption caused by the deadly virus outbreak in China.
Feb 1, 2020
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I: dsDNA viruses II: ssDNA viruses III: dsRNA viruses IV: (+)ssRNA viruses V: (−)ssRNA viruses VI: ssRNA-RT viruses VII: dsDNA-RT viruses
A virus (from the Latin virus meaning toxin or poison) is a microscopic infectious agent that can reproduce only inside a host cell. Viruses infect all types of organisms: from animals and plants, to bacteria and archaea. Since the initial discovery of tobacco mosaic virus by Martinus Beijerinck in 1898, more than 5,000 types of virus have been described in detail, although most types of virus remain undiscovered. Viruses are ubiquitous, as they are found in almost every ecosystem on Earth, and are the most abundant type of biological entity on the planet. The study of viruses is known as virology, and is a branch of microbiology.
Viruses consist of two or three parts: all viruses have genes made from either DNA or RNA, long molecules that carry genetic information; all have a protein coat that protects these genes; and some have an envelope of fat that surrounds them when they are outside a cell. Viruses vary in shape from simple helical and icosahedral shapes, to more complex structures. They are about 1/100th the size of bacteria. The origins of viruses in the evolutionary history of life are unclear: some may have evolved from plasmids—pieces of DNA that can move between cells—while others may have evolved from bacteria. In evolution, viruses are an important means of horizontal gene transfer, which increases genetic diversity.
Viruses spread in many ways; plant viruses are often transmitted from plant to plant by insects that feed on sap, such as aphids, while animal viruses can be carried by blood-sucking insects. These disease-bearing organisms are known as vectors. Influenza viruses are spread by coughing and sneezing, and others such as norovirus, are transmitted by the faecal-oral route, when they contaminate hands, food, or water. Rotaviruses are often spread by direct contact with infected children. HIV is one of several viruses that are transmitted through sexual contact.
Not all viruses cause disease, as many viruses reproduce without causing any obvious harm to the infected organism. Viruses such as hepatitis B can cause life-long or chronic infections, and the viruses continue to replicate in the body despite the hosts' defence mechanisms. In some cases, these chronic infections might be beneficial as they might increase the immune system's response against infection by other pathogens. However, in most cases viral infections in animals cause an immune response that eliminates the infecting virus. These immune responses can also be produced by vaccines that give lifelong immunity to a viral infection. Microorganisms such as bacteria also have defences against viral infection, such as restriction modification systems. Antibiotics have no effect on viruses, but antiviral drugs have been developed to treat both life-threatening and more minor infections.
This text uses material from Wikipedia, licensed under CC BY-SA