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Influenza Surveillance Report for MMWR Week 18

The flu activity level for the week ending May 5, 2007 is “no activity”. No activity indicates that lab confirmed cases of influenza have not been reported in the state. This is the first week that Texas has reported no activity in 2007.

The DSHS laboratory did not isolate any influenza from specimens collected during week 18.

No school closures or institutional outbreaks were reported during week 18.

Sixty-nine sentinel providers have reported for week 18. Of all patient visits during this week, 3.11% were due to influenza-like illness (ILI). The baseline for Texas is 3.71%. The baseline is the mean percentage of patient visits for ILI during non-influenza weeks for the previous three seasons plus two standard deviations.

Percentage of Influenza-Like Illness (ILI) Reported by Sentinel Providers in Texas as of 5/25/07
Week	# Reporting	Age 0-4	Age 5-24	Age 25-64	Age over 64	Total ILI	Total Patients	% ILI
2006-40	61	71	120	65	9	265	15479	1.71
2006-41	59	104	126	93	14	337	16457	2.04
2006-42	77	250	187	154	44	635	25223	2.51
2006-43	77	219	188	153	20	580	23296	2.48
2006-44	72	235	254	164	39	692	22504	3.07
2006-45	71	356	249	182	42	829	22660	3.65
2006-46	71	495	312	228	62	1097	24033	4.56
2006-47	76	450	277	237	95	1009	19958	5.05
2006-48	78	442	275	302	70	1089	24495	4.44
2006-49	84	374	325	283	96	1078	24229	4.44
2006-50	72	387	381	252	80	1100	22227	4.94
2006-51	67	349	259	187	50	845	17402	4.85
2006-52	63	460	199	264	104	1027	16039	6.40
2007-01	86	343	221	284	84	932	20681	4.50
2007-02	72	329	244	284	84	941	21819	4.31
2007-03	70	242	223	128	19	612	15461	3.95
2007-04	80	518	475	283	106	1382	24696	5.59
2007-05	82	560	580	380	62	1582	25999	6.08
2007-06	74	479	753	434	43	1709	26741	6.39
2007-07	82	685	755	466	71	1977	25436	7.77
2007-08	80	658	893	546	159	2256	27487	8.2
2007-09	76	585	661	475	132	1853	25965	7.13
2007-10	73	465	497	331	67	1360	21111	6.15
2007-11	56	380	347	396	84	1207	20651	5.84
2007-12	57	194	251	185	27	657	16210	4.05
2007-13	61	213	243	264	72	792	21393	3.70
2007-14	78	239	246	284	83	852	24500	3.47
2007-15	77	315	316	245	105	981	21020	4.66
2007-16	75	217	213	215	69	714	23028	3.10
2007-17	65	189	215	199	53	656	20703	3.16
2007-18	69	152	217	181	39	589	18881	3.11

*Influenza activity level corresponds to current MMWR week only and does not reflect previous weeks' activity.

2006 - 2007 Texas Influenza Surveillance Information --- Flu Reports

For the week ending: 10/7/06; 10/14/06; 10/21/06; 10/28/06; 11/04/06; 11/11/06; 11/18/06; 12/02/06; 12/09/06; 12/16/06; 12/23/06; 12/30/06; 1/06/07; 1/13/07; 1/20/07; 1/27/07; 2/10/07; 2/17/07; 2/24/07; 3/03/07; 3/10/07; 3/17/07; 3/24/07; 3/31/07; 4/07/07;