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The chart above shows that the overall quarterly trend is in the right direction, but as you can see below, there is troublesome variation from time to time. The up's and down's, I guess, are normal, but we all wish they stay down.
Month ----- Infection Rate
Oct 05 ----- 1.67
Nov 05 ----- 1.28
Dec 05 ----- 2.43
Jan 06 ----- 3.07
Feb 06 ----- 1.40
Mar 06 ----- 1.07
Apr 06 ----- 0.00
May 06 ----- 0.59
Jun 06 ----- 1.15
Jul 06 ----- 0.57
Aug 06 ----- 3.03
Sep 06 ----- 2.50
Oct 06 ----- 0.00
Nov 06 ----- 2.38
Dec 06 ----- 1.87
Jan 07 ----- 0.00
Feb 07 ----- 1.15
Mar 07 ----- 3.17
Apr 07 ----- 1.22