Occurrence of AH1N1 viral infection and clinical features in symptomatic patients who received medical care during the 2009 influenza pandemic in Central Mexico

Table 1 AH1N1 influenza infection, hospitalization and mortality rates for individuals with flu symptoms who sought medical care by geographic area from March to October, 2009

Geographic area	Screened with flu symptoms¹	Laboratory result available²	Rate x 100 (n)
Geographic area	Screened with flu symptoms¹	Laboratory result available²	Infection³	Hospitalization⁴	Mortality⁵
In the World⁺	-	-	(482 300)	-	1.2 (6 071)
American continent⁺	-	-	(185 067)	-	2.3 (4 399)
North America
Canada^†	-	-	(10 156)	15.7 (1 604)	0.8 (83)
USA^†	-	134 899	42.7 (57 602)	14.2 (8 204)	1.9 (1 123)
Mexico^‡	-	-	(50 234)	1.5 (800)	0.6 (328)
San Luis Potosi	6 922	6 158	44.9 (2 767)	5.8 (161)	0.7 (21)

¹ Fever, headache and cough were compulsory (in infants irritability replaced headache; in elderly fever could be missing), but other symptoms could be present.
² Nasopharyngeal exudate or bronchoalveolar lavage samples were taken at the moment of the physical exam; RT-PCR was used for diagnosis.
³ Infected cases confirmed by laboratory / total number of persons tested with available laboratory result.
⁴ Hospitalized with confirmed laboratory result / total number of persons infected.
⁵ Deaths with confirmed laboratory result / total number of persons infected.
⁺ Information up to November 1, 2009 [25].
^† Information up to October 31, 2009 [23].
^‡ Information up to October 26, 2009 [24].

ISSN: 1471-2334