In many people, the infection waxes and wanes. Tissue destruction and necrosis are often balanced by healing and fibrosis. Affected tissue is replaced by scarring and cavities filled with caseous necrotic material. During active disease, some of these cavities are joined to the air passages bronchi and this material can be coughed up. It contains living bacteria, so can spread the infection. Treatment with appropriate antibiotics kills bacteria and allows healing to take place. Upon cure, affected areas are eventually replaced by scar tissue.
What process replaces tissue damaged by TB?
scarring

One year after its publication To Kill a Mockingbird had been translated into ten languages. In the years since, it has sold more than 30 million copies and been translated into more than 40 languages. The novel has never been out of print in hardcover or paperback, and has become part of the standard literature curriculum. A 2008 survey of secondary books read by students between grades 912 in the U.S. indicates the novel is the most widely read book in these grades. A 1991 survey by the Book of the Month Club and the Library of Congress Center for the Book found that To Kill a Mockingbird was rated behind only the Bible in books that are "most often cited as making a difference".[note 1] It is considered by some to be the Great American Novel.
How many languages has the book been translated into?
more than 40

The term air defence was probably first used by Britain when Air Defence of Great Britain (ADGB) was created as a Royal Air Force command in 1925. However, arrangements in the UK were also called 'anti-aircraft', abbreviated as AA, a term that remained in general use into the 1950s. After the First World War it was sometimes prefixed by 'Light' or 'Heavy' (LAA or HAA) to classify a type of gun or unit. Nicknames for anti-aircraft guns include AA, AAA or triple-A, an abbreviation of anti-aircraft artillery; "ack-ack" (from the spelling alphabet used by the British for voice transmission of "AA"); and archie (a World War I British term probably coined by Amyas Borton and believed to derive via the Royal Flying Corps from the music-hall comedian George Robey's line "Archibald, certainly not!").
What year was the ADGB created?
1925