Historical clue formulations

• Lose progress, in a way — 2025-06-01
• Medical setback — 2017-04-17
• Turn for the worse — 2009-06-06
• Medical setback — 2007-05-16
• Backslide — 2005-09-04
• Disappointing return — 2005-08-21
• Slide back — 2005-05-22
• Medical disappointment — 2004-05-02
• Backslide — 2003-09-03
• Problem during convalescence — 2002-09-25
• Medical problem — 2001-04-26
• Patient's woe — 2000-02-06
• Backslide, medically — 1999-02-15
• Backslide — 1998-11-28
• Patient's problem — 1996-09-06
• Patient's worry* — 1995-06-21
• Setback — 1994-08-30