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Influenza vaccines, colloquially known as flu shots, are vaccines that protect against infection by influenza viruses. [14][15] New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes. [14]
Korea (Korean: 한국, romanized: Hanguk in South Korea, or 조선, Chosŏn in North Korea) is a peninsular region in East Asia consisting of the Korean Peninsula (한반도, Hanbando in South Korea, or 조선반도, Chosŏnbando in North Korea), Jeju Island, and smaller islands. Since the end of World War II in 1945, it has been politically ...
South Korea, [c] officially the Republic of Korea (ROK), [d] is a country in East Asia. It constitutes the southern part of the Korean Peninsula and borders North Korea along the Korean Demilitarized Zone; though it also claims the land border with China and Russia.
The sortable table below contains the three sets of ISO 3166-1 country codes for each of its 249 countries, links to the ISO 3166-2 country subdivision codes, and the Internet country code top-level domains (ccTLD) which are based on the ISO 3166-1 alpha-2 standard with the few exceptions noted.
The COVID-19 pandemic (also known as the coronavirus pandemic), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), began with an outbreak of COVID-19 in Wuhan, China, in December 2019. It spread to other areas of Asia, and then worldwide in early 2020. The World Health Organization (WHO) declared the outbreak a public ...
The 1918–1920 flu pandemic, also known as the Great Influenza epidemic or by the common misnomer Spanish flu, was an exceptionally deadly global influenza pandemic caused by the H1N1 subtype of the influenza A virus. The earliest documented case was March 1918 in the state of Kansas in the United States, with further cases recorded in France ...
It is the first vaccine to have been developed against a contagious disease. In 1796, British physician Edward Jenner demonstrated that an infection with the relatively mild cowpox virus conferred immunity against the deadly smallpox virus. Cowpox served as a natural vaccine until the modern smallpox vaccine emerged in the 20th century.
