Immunology is strongly experimental in everyday practice but is also characterized by an ongoing theoretical attitude. Many theories have been suggested in immunology from the end of the nineteenth century up to the present time. The end of the 19th century and the beginning of the 20th century saw a battle between "cellular" and "humoral" theories of immunity. According to the cellular theory of immunity, represented in particular by Elie Metchnikoff, it was cells – more precisely, phagocytes – that were responsible for immune responses. In contrast, the humoral theory of immunity, held by Robert Koch and Emil von Behring, among others, stated that the active immune agents were soluble components (molecules) found in the organism’s “humors” rather than its cells.
What are two opposing theories of early 20th century immunology?
"cellular" and "humoral"


Input: Antenna (radio)
It is best for the receiving antenna to match the polarization of the transmitted wave for optimum reception. Intermediate matchings will lose some signal strength, but not as much as a complete mismatch. A circularly polarized antenna can be used to equally well match vertical or horizontal linear polarizations. Transmission from a circularly polarized antenna received by a linearly polarized antenna (or vice versa) entails a 3 dB reduction in signal-to-noise ratio as the received power has thereby been cut in half.

A transmission can cause reduction in what?
Output: signal-to-noise ratio


Input: Article: The very large and ornate School Hall and School Library (by L K. Hall) were erected in 1906-8 across the road from Upper School as the school's memorial to the Etonians who had died in the Boer War. Many tablets in the cloisters and chapel commemorate the large number of dead Etonians of the Great War. A bomb destroyed part of Upper School in World War Two and blew out many windows in the Chapel. The college commissioned replacements by Evie Hone (1949–52) and by John Piper and Patrick Reyntiens (1959 onwards).

Now answer this question: Who was hired to replace windows in the Chapel from 1949-1952?

Output: Evie Hone


Article: Prior to the 20th century drugs were generally produced by small scale manufacturers with little regulatory control over manufacturing or claims of safety and efficacy. To the extent that such laws did exist, enforcement was lax. In the United States, increased regulation of vaccines and other biological drugs was spurred by tetanus outbreaks and deaths caused by the distribution of contaminated smallpox vaccine and diphtheria antitoxin. The Biologics Control Act of 1902 required that federal government grant premarket approval for every biological drug and for the process and facility producing such drugs. This was followed in 1906 by the Pure Food and Drugs Act, which forbade the interstate distribution of adulterated or misbranded foods and drugs. A drug was considered misbranded if it contained alcohol, morphine, opium, cocaine, or any of several other potentially dangerous or addictive drugs, and if its label failed to indicate the quantity or proportion of such drugs. The government's attempts to use the law to prosecute manufacturers for making unsupported claims of efficacy were undercut by a Supreme Court ruling restricting the federal government's enforcement powers to cases of incorrect specification of the drug's ingredients.

Question: What caused a Tetanus outbreak?
Ans: contaminated smallpox vaccine and diphtheria antitoxin


Here is a question about this article: Anita Baker, Sade, Regina Belle, and Luther Vandross are other examples of artists who appeal to mainstream AC, urban AC and smooth jazz listeners. Some soft AC and urban AC stations like to play smooth jazz on the weekends. In recent years, the Smooth Jazz format has been renamed to Smooth AC, as an attempt to lure younger listeners.
What is the answer to this question: Along with urban adult contemporary and smooth jazz, what station format might feature music from Sade?
****
So... mainstream AC


Article: The FBI has maintained files on numerous people, including celebrities such as Elvis Presley, Frank Sinatra, John Denver, John Lennon, Jane Fonda, Groucho Marx, Charlie Chaplin, the band MC5, Lou Costello, Sonny Bono, Bob Dylan, Michael Jackson, and Mickey Mantle. The files were collected for various reasons. Some of the subjects were investigated for alleged ties to the Communist party (Charlie Chaplin and Groucho Marx), or in connection with antiwar activities during the Vietnam War (John Denver, John Lennon, and Jane Fonda). Numerous celebrity files concern threats or extortion attempts against them (Sonny Bono, John Denver, John Lennon, Elvis Presley, Michael Jackson, Mickey Mantle, Groucho Marx, and Frank Sinatra).

Question: Did the FBI keep files on Elvis Presley?
Ans:
including celebrities such as Elvis Presley