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PV2
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References
Quizzes
Encyclopaedia Britannica thistle graphic to be used with a Mendel/Consumer quiz in place of a photograph.
44 Questions from Britannica’s Most Popular Health and Medicine Quizzes
Discover
Flags of the countries of the world (flagpoles).
How Many Countries Are There in the World?
Russian grand duchess Anastasia; undated photograph. (Anastasiya Nikolayevna, Tsar Nicholas II)
Did Duchess Anastasia Survive Her Family’s Execution?
Vietnam War. U.S. President Lyndon B. Johnson awards the Distinguished Service Cross to First Lieutenant Marty A. Hammer, during a visit to military personnel, Cam Ranh Bay, South Vietnam, October 26, 1966. President Johnson
Vietnam War Timeline
Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)
All 119 References in “We Didn’t Start the Fire,” Explained
New Zealand. Political/Physical map. Includes locator.
Where Is “Old Zealand”?
The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)
New Seven Wonders of the World
Statue of Nostradamus
Nostradamus and His Prophecies

PV2

virus

Learn about this topic in these articles:

polio

  • Polio vaccine
    In polio

    …forms) of wild poliovirus: PV1, PV2, and PV3. The most widespread serotype is PV1. Both PV2 and PV3 have been eradicated.

    Read More
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