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== Visual Numerical and visual data == === Google Scholar === The following table summarizes per-year mentions on Google Scholar as of June 5, 2021. {| class="sortable wikitable"! Year! "infection control"! "infection prevention"! "lockdown"! "quarantine"|-| 2000 || 5,760 || 1,100 || 270 || 8,680|-| 2002 || 6,270 || 1,530 || 503 || 10,600|-| 2004 || 9,900 || 2,140 || 698 || 15,400|-| 2006 || 11,500 || 2,440 || 1,130 || 20,400|-| 2008 || 15,100 || 2,940 || 1,520 || 28,700|-| 2010 || 17,700 || 3,740 || 1,680 || 28,500|-| 2012 || 21,500 || 5,940 || 2,320 || 29,100 |-| 2014 || 22,800 || 6,980 || 2,610 || 22,500 |-| 2016 || 25,000 || 8,470 || 2,800 || 22,300 |-| 2018 || 24,800 || 9,770 || 3,130 || 21,100|-| 2020 || 37,700 || 23,300 || 106,000 || 66,900 |-|} [[File:xxx|thumb|center|700px]]
=== Google Trends ===
