Answer:The San Diego County Fair (formerly called the Del Mar Fair) is a county fair held every summer at the Del Mar Fairgrounds in Del Mar, California. The fair is a major draw for San Diego County residents; in recent years, attendance figures have risen above a million annually, reaching a record attendance of 1,609,481 in 2016. As of 2016, the San Diego County Fair was the largest county fair in the United States, and the fifth largest fair of any kind.The fair began in 1880 as an agricultural fair. The location moved from place to place for several years, finally settling on the Del Mar Fairgrounds when it opened in 1936. There was no fair in 1917–18 because of World War I, 1942–45 because of World War II, and 2020 in response to the COVID-19 pandemic.
In 1954, the fair's name was changed to the Southern California Exposition and San Diego County Fair. In 1970, this was shortened to the Southern California Exposition. The fair was again renamed in 1984 to the Del Mar Fair, which lasted until 2002 when the name San Diego County Fair was reinstated. It is sometimes still referred to as the "Del Mar Fair" by locals.
After visiting farm animals at the fair in 2019, a 2-year-old boy died and three others were sickened but not hospitalized; they had contracted pathogenic E. coli, and the child had developed a kidney infection.
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