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Ebolaviruses were first described in 1976 near the Ebola River in what is now the Democratic Republic of the Congo. Since then, ebolaviruses have emerged periodically and infected people in several African countries. Prior known cases and outbreaks of Ebola disease are described below by year or country where they were discovered or imported.
Dec 11, 2017 · 2017 Events. Updated: August 21, 2018 | Original: December 11, 2017. From the inauguration of Donald Trump to the first total solar eclipse to traverse the Lower 48 in nearly a century, 2017 was a ...
9546. The solar eclipse of August 21, 2017, dubbed the " Great American Eclipse " by some media, [1] was a total solar eclipse visible within a band that spanned the contiguous United States from the Pacific to the Atlantic coasts. It was also visible as a partial solar eclipse from as far north as Nunavut in northern Canada to as far south as ...
Nov 13, 2009 · Secession, as it applies to the outbreak of the American Civil War, comprises the series of events that began on December 20, 1860, and extended through June 8 of the next year when eleven states ...
Feb 15, 2018 · Coccidioidomycosis is known to be endemic to the southwestern United States, south-central Washington, northern Mexico, and parts of Central and South America . Infection occurs primarily by inhalation of environmental arthroconidia, and symptoms develop in ≈40% of infected persons typically within 1–3 weeks after exposure ( 5 ).
Jan 9, 2024 · Dengue outbreaks occasionally occur in the continental United States. Dengue is common in the U.S. territories of American Samoa, Puerto Rico, and the U.S. Virgin Islands, and the freely associated states, including the Federated States of Micronesia, the Republic of Marshall Islands, and the Republic of Palau. Most dengue cases reported in the ...
The Historical Topographic Map Collection, or HTMC, provides a comprehensive digital repository of all scales and all editions of U.S. Geological Survey (USGS) printed topographic maps that is easily discovered, browsed, and downloaded by the public at no cost. In 2011, the USGS National Geospatial Program began publishing scans of 1:250,000 ...
