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Hace 2 días · It is a negative-sense, single-stranded RNA virus. [2] Its name is derived from the large cells known as syncytia that form when infected cells fuse. [2] [3] RSV is a common cause of respiratory hospitalization in infants, and reinfection remains common in later life though often with less severity.
Hace 21 horas · e. Influenza A virus subtype H5N1 (A/H5N1) is a subtype of the influenza A virus, which causes influenza (flu), predominantly in birds. It is enzootic (maintained in the population) in many bird populations, and also panzootic (affecting animals of many species over a wide area). [1] A/H5N1 virus can also infect mammals (including humans) which ...
Hace 3 días · Википедия была официально открыта 15 января 2001 года как одиночный англоязычный раздел на www.wikipedia.com и была анонсирована Сэнгером в списке рассылки «Нупедии».
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Hace 3 días · Portugal, [e] officially the Portuguese Republic, [f] is a country located on the Iberian Peninsula, in Southwestern Europe, and whose territory also includes the Macaronesian archipelagos of the Azores and Madeira.
Hace 1 día · Asia ( / ˈeɪʒə / ⓘ AY-zhə, UK also / ˈeɪʃə / AY-shə) is the largest continent [note 1] [10] [11] in the world by both land area and population. [11] . It covers an area of more than 44 million square kilometers, [note 2] about 30% of Earth 's total land area and 8% of Earth's total surface area.
Hace 4 días · The Encyclopedia Britannica contains carefully edited articles on all major topics. It fits the ideal purpose of a reference work as a place to get started, or to refer back to as you read and write. The articles in Britannica are written by expert authors who are both identifiable and credible.
