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The COVID-19 pandemic arrived in Europe with its first confirmed case in Bordeaux, France, on 24 January 2020, and subsequently spread widely across the continent. By 17 March 2020, every country in Europe had confirmed a case, [312] and all had reported at least one death, with the exception of Vatican City.
Madagascar, officially the Republic of Madagascar, [a] is an island country comprising the island of Madagascar and numerous smaller peripheral islands. Lying off the southeastern coast of Africa, it is the world's fourth largest island, the second-largest island country and the 46th largest country in the world. [14]
Africa is the world's second largest and second-most populous continent after Asia. At about 30.3 million km 2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth 's land area and 6% of its total surface area. [7] With 1.4 billion people [1] [2] as of 2021, it accounts for about 18% of the world's human population.
Leonardo di ser Piero da Vinci [b] (15 April 1452 – 2 May 1519) was an Italian polymath of the High Renaissance who was active as a painter, draughtsman, engineer, scientist, theorist, sculptor, and architect. [3] While his fame initially rested on his achievements as a painter, he has also become known for his notebooks, in which he made ...
The Russian alphabet ( ру́сский алфави́т, russkiy alfavit, [a] or ру́сская а́збука, russkaya azbuka, [b] more traditionally) is the script used to write the Russian language. It comes from the Cyrillic script, which was devised in the 9th century for the first Slavic literary language, Old Slavonic.
A 12% solution is widely used in waterworks for the chlorination of water, and a 15% solution is more commonly used for disinfection of waste water in treatment plants. Sodium hypochlorite can also be used for point-of-use disinfection of drinking water, [39] taking 0.2-2 mg of sodium hypochlorite per liter of water.