Historical clue formulations

• Genesis — 2025-12-07
• Starting point — 2024-12-05
• "Do you, my poppet, feel infirm? / You probably contain a ___": Ogden Nash — 2022-10-14
• Microbe — 2022-07-11
• Kernel of an idea — 2022-05-08
• Beginning stage — 2021-12-26
• Start of an idea — 2020-11-11
• Start of an idea — 2020-10-28
• Start of a 14-Across — 2020-09-24
• Seed — 2019-11-16
• Wheat ___ — 2019-06-02
• Cause of a cold — 2018-04-18
• Wheat ___ — 2018-03-15
• Target for a disinfectant wipe — 2017-10-30
• ___ warfare — 2017-09-13
• Infection cause — 2017-08-22
• Start of an idea — 2017-01-31
• Genesis of an idea — 2016-11-06
• Wheat ___ — 2016-05-01
• Thought starter — 2016-04-09
• It can make you sick — 2015-08-01
• Purell target — 2014-08-10
• Bug — 2013-03-11
• Seed — 2012-07-19
• It might make you sick — 2011-07-20
• It may be what ails you — 2011-02-28
• Lysol target — 2011-01-19
• Basis — 2010-11-19
• "Cootie" — 2010-10-27
• Start, as of an idea — 2010-04-06
• Idea's start — 2010-02-28
• Starting point — 2009-11-29
• Listerine target — 2009-03-31
• Beginning, as of an idea — 2008-01-27
• It might make you sick — 2007-10-28
• It's sickening — 2006-07-21
• Spark — 2006-06-03
• It can make you sick — 2004-11-01
• Starting point — 2003-08-23
• Start of an idea — 2003-07-09
• Start of an idea — 2001-09-23
• Idea's beginning — 2001-02-07
• Origin, as of an idea — 2001-01-30
• Disease cause — 2000-05-31
• Starting point — 1998-04-23
• Kind of warfare — 1998-04-22
• Microbe — 1997-05-05
• Start, as of an idea — 1996-08-28
• Listerine target — 1996-04-07
• Wheat center — 1996-03-21