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A novel virus is one that has not previously been recorded. It can be a virus that is isolated from its natural reservoir or isolated as the result of spread to an animal or human host where the virus had not been identified before.
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Jul 30, 2024 · Virus, infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria. Viruses possess unique infective properties and thus often cause disease in host organisms.
病毒（ virus ）是僅能在生物體活細胞內複製繁衍的亞顯微 [註 1] 病原體 [1] 。 它由 核酸 分子（ DNA 或 RNA ）与保护性外壳（ 蛋白质 ）构成的非细胞形态的类生物结构（bio-like structure），無法自行表現出 生命現象 ，是介於生命体及非生命體之間的生化結構，既 ...
Viruses are small germs (pathogens) that can infect you and make you sick. They can infect humans, plants, animals, bacteria and fungi. Each one infects only specific types of hosts. Viral infections in humans can cause no symptoms or make you extremely ill. Types of diseases they can cause include:
Aug 15, 2024 · 病毒 （ virus ）是僅能在 生物體 活細胞內複製繁衍的亞顯微 [ 註 1] 病原體 [ 1] 。. 它由 核酸 分子（ DNA 或 RNA ）與保護性外殼（ 蛋白質 ）構成的非細胞形態的類生物結構（bio-like structure），無法自行表現出 生命現象 ，是介於生命體及非生命體之間的生化結構 ...
Coronavirus disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus. Most people infected with the virus will experience mild to moderate respiratory illness and recover without requiring special treatment. However, some will become seriously ill and require medical attention.
A virus is a tiny, infectious particle that can reproduce only by infecting a host cell. Viruses "commandeer" the host cell and use its resources to make more viruses, basically reprogramming it to become a virus factory. Because they can't reproduce by themselves (without a host), viruses are not considered living.
Plant viruses are often spread from plant to plant by insects and other organisms, known as vectors. Some viruses of humans and other animals are spread by exposure to infected bodily fluids. Viruses such as influenza are spread through the air by droplets of moisture when people cough or sneeze.
Oct 19, 2023 · Viruses are tiny infectious agents that rely on living cells to multiply. They may use an animal, plant, or bacteria host to survive and reproduce. As such, there is some debate as to whether or not viruses should be considered living organisms. A virus that is outside of a host cell is known as a virion.
