Historical clue formulations

• Malaria may cause these — 2012-11-29
• Feverish conditions — 2009-03-01
• Fits — 2006-03-18
• Malarial episodes — 2004-11-07
• Shivering fits — 2002-10-02
• Some fevers — 2001-11-02
• Malaria symptoms — 1998-12-04
• Feverish fits — 1998-06-26
• Tropical maladies — 1996-07-07
• Feverish fits — 1995-07-30
• Shivering fits — 1995-03-19
• Bouts of chills — 1994-07-11
• Chills — 1994-07-07