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🔗 United States 🔗 International relations 🔗 Disaster management 🔗 Medicine 🔗 Viruses 🔗 Death

The 2009 flu pandemic in the United States was a novel strain of the Influenza A/H1N1 virus, commonly referred to as "swine flu", that began in the spring of 2009. The virus had spread to the US from an outbreak in Mexico.

The U.S. Centers for Disease Control and Prevention (CDC) estimates that from April 12, 2009 to April 10, 2010, there were 60.8 million cases, 274,000 hospitalizations, and 12,469 deaths (0.02% infection fatality rate/Mortality rate) in the United States due to the virus.

Mass amateurization refers to the capabilities that new forms of media have given to non-professionals and the ways in which those non-professionals have applied those capabilities to solve problems (e.g. create and distribute content) that compete with the solutions offered by larger, professional institutions. Mass amateurization is most often associated with Web 2.0 technologies. These technologies include the rise of blogs and citizen journalism, photo and video-sharing services such as Flickr and YouTube, user-generated wikis like Wikipedia, and distributed accommodation services such as Airbnb. While the social web is not the only technology responsible for the rise of mass amateurization, Clay Shirky claims Web 2.0 has allowed amateurs to undertake increasingly complex tasks resulting in accomplishments that would seem daunting within the traditional institutional model.

In addition to whole websites and applications, Web 2.0 has also birthed a variety of digital tools that facilitate organization and problem solving on a large scale. These tools include tags, trackbacks, and hashtags. These new forms of media became widely available during the first decade of the 21st century due in part to the fall of transactional costs of creating and distributing media. Mass amateurization is a social, cumulative and collaborative activity, wherein ideas will flow back up the pipeline from consumers and they will share them among themselves.

There is no institutional hierarchy in mass amateurization. There is only an informal group of collaborators working to solve a problem. Due to mass amateurization, amateurs are able to collaborate without the interference from the inherent obstacles associated with institutions. These obstacles include the costs that an institution incurs while educating, training, directing, coaching, advising, and organizing its members.

🔗 Economics 🔗 Numismatics

In economics, Gresham's law is a monetary principle stating that "bad money drives out good". For example, if there are two forms of commodity money in circulation, which are accepted by law as having similar face value, the more valuable commodity will gradually disappear from circulation.

The law was named in 1860 by Henry Dunning Macleod, after Sir Thomas Gresham (1519–1579), who was an English financier during the Tudor dynasty. However, the concept itself had been previously expressed by others, including by Aristophanes in his play The Frogs, which dates from around the end of the 5th century BC, in the 14th century by Nicole Oresme c. 1350, in his treatise On the Origin, Nature, Law, and Alterations of Money, and by jurist and historian Al-Maqrizi (1364–1442) in the Mamluk Empire; and in 1519 by Nicolaus Copernicus in a treatise called Monetae cudendae ratio For this reason, it is occasionally known as the Gresham–Copernicus' law.

🔗 Mass surveillance 🔗 Sociology

The small-world experiment comprised several experiments conducted by Stanley Milgram and other researchers examining the average path length for social networks of people in the United States. The research was groundbreaking in that it suggested that human society is a small-world-type network characterized by short path-lengths. The experiments are often associated with the phrase "six degrees of separation", although Milgram did not use this term himself.

🔗 Automobiles

A cyclecar was a type of small, lightweight and inexpensive car manufactured in Europe and the United States between 1910 and the early 1920s. The purpose of cyclecars was to fill a gap in the market between the motorcycle and the car.

The demise of cyclecars was due to larger cars – such as the Citroën Type C, Austin 7 and Morris Cowley – becoming more affordable. Small, inexpensive vehicles reappeared after World War II, and were known as microcars.

🔗 Medicine 🔗 Statistics 🔗 Microbiology 🔗 Game theory

Herd immunity (also called herd effect, community immunity, population immunity, or social immunity) is a form of indirect protection from infectious disease that occurs when a large percentage of a population has become immune to an infection, whether through previous infections or vaccination, thereby providing a measure of protection for individuals who are not immune. In a population in which a large proportion of individuals possess immunity, such people being unlikely to contribute to disease transmission, chains of infection are more likely to be disrupted, which either stops or slows the spread of disease. The greater the proportion of immune individuals in a community, the smaller the probability that non-immune individuals will come into contact with an infectious individual, helping to shield non-immune individuals from infection.

Individuals can become immune by recovering from an earlier infection or through vaccination. Some individuals cannot become immune due to medical reasons, such as an immunodeficiency or immunosuppression, and in this group herd immunity is a crucial method of protection. Once a certain threshold has been reached, herd immunity gradually eliminates a disease from a population. This elimination, if achieved worldwide, may result in the permanent reduction in the number of infections to zero, called eradication. Herd immunity created via vaccination contributed to the eventual eradication of smallpox in 1977 and has contributed to the reduction of the frequencies of other diseases. Herd immunity does not apply to all diseases, just those that are contagious, meaning that they can be transmitted from one individual to another. Tetanus, for example, is infectious but not contagious, so herd immunity does not apply.

The term "herd immunity" was first used in 1923. It was recognized as a naturally occurring phenomenon in the 1930s when it was observed that after a significant number of children had become immune to measles, the number of new infections temporarily decreased, including among susceptible children. Mass vaccination to induce herd immunity has since become common and proved successful in preventing the spread of many infectious diseases. Opposition to vaccination has posed a challenge to herd immunity, allowing preventable diseases to persist in or return to communities that have inadequate vaccination rates.

🔗 Pharmacology

The oligodynamic effect (from Greek oligos "few", and dynamis "force") is a biocidal effect of metals, especially heavy metals, that occurs even in low concentrations.

In modern times, the effect was observed by Karl Wilhelm von Nägeli, although he did not identify the cause. Scholarly texts from ancient India promoted the use of brass and silver in ritual cleansing practice as well as in consumption of food and drink. The ancient Indian medical text Sushruta Samhita promoted the use of specific metals in surgical procedures as a measure to prevent infection. Brass doorknobs and silverware both exhibit this effect to an extent.

🔗 China 🔗 Linguistics 🔗 Food and drink 🔗 Linguistics/Etymology 🔗 Food and drink/Beverages

The etymology of the word tea can be traced back to the various Chinese pronunciations of the word. Nearly all the words for tea worldwide, fall into three broad groups: te, cha and chai, which reflected the history of transmission of tea drinking culture and trade from China to countries around the world. The few exceptions of words for tea that do not fall into these three broad groups are mostly from the minor languages from the botanical homeland of the tea plant, and likely to be the ultimate origin of the Chinese words for tea. Notably, none of these words mean 'dinner' or a late afternoon meal.

🔗 Blogging

Posterous was a simple blogging platform started in May 2008. It supported integrated and automatic posting to other social media tools such as Flickr, Twitter, and Facebook, a built-in Google Analytics package, and custom themes. It was based in San Francisco and funded by Y Combinator.

Updating to Posterous was similar to other blogging platforms. Posting could be done by logging into the website's rich text editor, but it was particularly designed for mobile blogging. Mobile methods include sending an email, with attachments of photos, MP3s, documents, and video (both links and files). Many social media pundits considered Posterous to be the leading free application for lifestreaming. The platform received wide attention when leading social media expert Steve Rubel declared he was moving his blogging activity entirely to Posterous.

Posterous also had its own URL shortening service, which as of March 2010 could post to Twitter.

Posterous allowed users to point the DNS listing for a domain name or subdomain they already owned to their Posterous account, allowing them to have a site hosted by Posterous that used their own domain name.

In January 2010, the3six5, a Posterous-based storytelling project, launched. It was nominated for a Webby Award in 2011.

In May 2010, Posterous was recognized as one of the “2010 Hottest Silicon Valley Companies” by Lead411.

🔗 United States 🔗 Disaster management 🔗 Medicine 🔗 Viruses 🔗 Korea 🔗 COVID-19 🔗 Europe 🔗 China/Chinese history 🔗 Iran 🔗 North America 🔗 Medicine/Pulmonology 🔗 Italy 🔗 China 🔗 East Asia

The 2019–20 coronavirus pandemic is an ongoing pandemic of coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The outbreak was first identified in Wuhan, Hubei, China, in December 2019, and was recognized as a pandemic by the World Health Organization (WHO) on 11 March. As of 28 March 2020, more than 663,000 cases of COVID-19 have been reported in over 190 countries and territories, resulting in approximately 30,800 deaths. More than 141,000 people have since recovered.

The virus is mainly spread during close contact and via respiratory droplets produced when people cough or sneeze. Respiratory droplets may be produced during breathing but the virus is not considered airborne. People may also catch COVID-19 by touching a contaminated surface and then their face. It is most contagious when people are symptomatic, although spread may be possible before symptoms appear. The time between exposure and symptom onset is typically around five days, but may range from 2 to 14 days. Common symptoms include fever, cough, and shortness of breath. Complications may include pneumonia and acute respiratory distress syndrome. There is no known vaccine or specific antiviral treatment. Primary treatment is symptomatic and supportive therapy. Recommended preventive measures include hand washing, covering one's mouth when coughing, maintaining distance from other people, and monitoring and self-isolation for people who suspect they are infected.

Efforts to prevent the virus spreading include travel restrictions, quarantines, curfews, workplace hazard controls, event postponements and cancellations, and facility closures. These include the quarantine of Hubei, national or regional quarantines elsewhere in the world, curfew measures in China and South Korea, various border closures or incoming passenger restrictions, screening at airports and train stations, and outgoing passenger travel bans. Schools and universities have closed either on a nationwide or local basis in more than 160 countries, affecting more than 1.5 billion students.

The pandemic has led to severe global socioeconomic disruption, the postponement or cancellation of sporting, religious, and cultural events, and widespread fears of supply shortages which have spurred panic buying. Misinformation and conspiracy theories about the virus have spread online, and there have been incidents of xenophobia and racism against Chinese and other East and Southeast Asian people.