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  1. 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.

  2. The COVID-19 pandemic(also known as the coronavirus pandemic), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), began with an outbreakof COVID-19in Wuhan, China, in December 2019. It spread to other areas of Asia, and then worldwidein early 2020.

  3. Polyethylene glycol (PEG; / ˌpɒliˈɛθəlˌiːn ˈɡlaɪˌkɒl, - ˈɛθɪl -, - ˌkɔːl /) is a polyether compound derived from petroleum with many applications, from industrial manufacturing to medicine. PEG is also known as polyethylene oxide (PEO) or polyoxyethylene (POE), depending on its molecular weight.

  4. Park Chung-hee Democratic Republican. Presidential elections were held in South Korea on 27 April 1971. [ 1 ] The result was a victory for incumbent president Park Chung-hee, who won 53.2% of the vote. Voter turnout was 79.8%. [ 2 ] Within a year of his re-election, Park declared martial law and introduced the Yushin Constitution, which vested ...

  5. en.wikipedia.org › wiki › NGC_6744NGC 6744 - Wikipedia

    NGC 6744 (also known as Caldwell 101 or the Pavo Galaxy[3]) is an intermediate spiral galaxy about 30 million light-years away [2] in the constellation Pavo (Peacock). It is considered as a Milky Way mimic in the immediate vicinity, displaying flocculent (fluffy) arms and an elongated core.

  6. Air France Flight 447 (AF447 / AFR447) [b] was a scheduled international passenger flight from Rio de Janeiro, Brazil, to Paris, France. On 1 June 2009, inconsistent airspeed indications and miscommunication led to the pilots inadvertently stalling the Airbus A330.

  7. en.wikipedia.org › wiki › NGC_6604NGC 6604 - Wikipedia

    NGC 6604 is a young [6] open cluster of stars in the equatorial constellation of Serpens, positioned about 1.5° north of the Eagle Nebula (NGC 6611). [7] . The cluster was discovered by William Herschel on July 15, 1784. [8] . It is located at a distance of 4,580 [2] light years from the Sun, about 210 ly (65 pc) above the galactic plane. [7] .

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