Symptom Frequencies
Seasonal (n=149)a Pandemic (n=88)a p Seasonal/Pandemic
Fever
Yes 120 (93.8%) 87 (100%) *p=0.017
No 8 (6.2%) 0  
Cough
Yes 125 (97.7%) 85 (98.8%) p=0.532
No 3 (2.3%) 1 (1.2%)  
Chills
Yes 55 (50.4%) 36 (50%) p=0.952
No 54 (49.6%) 36 (50%)  
Dyspnea
Yes 90 (72%) 73 (84.9%) *p=0.028
No 35 (28%) 13 (15.1%)  
Sore Throat
Yes 40 (37.1%) 28 (41.2%) p=0.583
No 68 (62.9%) 40 (58.8%)  
Arthralgia
Yes 42 (39.6%) 22 (33.8%) p=0.449
No 64 (60.4%) 43 (66.2%)  
Myalgia
Yes 64 (60.9%) 45 (66.2%) p=0.487
No 41 (39.1%) 23 (33.8%)  
Conjunctivitis
Yes 8 (6.7%) 12 (15.6%) *p=0.045
No 111 (93.3%) 65 (84.4%)  
Rhinorrhea
Yes 72 (64.9%) 50 (62.5%) p=0.670
No 49 (35.1%) 30 (37.5%)  
Diarrhea
Yes 22 (20.2%) 15 (18.5%) p=0.999
No 97 (79.8%) 66 (81.5%)  
aNot all symptoms were available for all patients
*Statistically significant by Chi-Square Test
Table 2: Frequencies of acute respiratory infection symptoms in patients infected by pandemic and seasonal influenza A virus.
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