Historical clue formulations

• Kind of infection — 2021-08-20
• ___ infection — 2014-09-01
• Kind of infection — 2012-10-02
• Sycosis source, informally — 2012-04-28
• Kind of infection — 2010-01-24
• Health menace, briefly — 2009-12-09
• Kind of infection — 2006-02-25
• Kind of infection, for short — 2005-06-05
• Kind of infection — 2001-09-30
• Infectious bacteria, briefly — 1999-12-13
• Infection cause — 1996-02-16