Patients Proportion, n/N (%) Proportion, n/N (%) Proportion, n/N (%) Proportion, n/N (%)
2017 influenza season Non-influenza season 2018 influenza season All seasons
Clinical respiratory illness Clinical respiratory illness Clinical respiratory illness Clinical respiratory illness Clinical respiratory illness
All AMI 20/56 (35.7%) 27/210 (12.9%) 37/478 (7.7%) 84/744 (11.3%)
New onset AMI 18/44 (40.9%) 27/198 (13.6%) 32/436 (7.3%) 77/678 (11.4%)
Recurrent onset AMI 2/12 (16.7%) 0/12 (0%) 5/42 (11.9%) 7/66 (10.6%)
NSTEMI 6/18 (33.3%) 3/41 (7.3%) 3/46 (6.5%) 12/105 (11.4%)
STEMI 14/38 (36.8%) 24/169 (14.2%) 34/432 (7.9%) 72/639 (11.3%)
Low-troponin AMI 7/20 (35.0%) 9/78 (11.5%) 11/127 (8.7%) 27/225 (12.0%)
High-troponin AMI 3/8 (37.5%) 1/32 (3.1%) 4/35 (11.0%) 8/75 (10.7%)
Laboratory-confirmed Influenza Laboratory-confirmed Influenza Laboratory-confirmed Influenza Laboratory-confirmed Influenza Laboratory-confirmed Influenza
All AMI 1/56 (1.8%) 0/12 (0%) 7/478 (1.5%) 8/546 (1.5%)
New onset AMI 1/44 (2.3%) 0/11 (0%) 5/436 (1.1%) 6/491 (1.2%)
Recurrent AMI 0/12 (0%) 0/1 (0%) 2/42 (4.8%) 2/55 (3.6%)
NSTEMI 0/18 (0%) 0/4 (0%) 0/46 (0%) 0/68 (0%)
STEMI 1/38 (2.6%) 0/8 (0%) 7/432 (1.6%) 8/478 (1.7%)
Low-troponin AMI 1/20 (5%) 0/3 (0%) 2/127 (1.6%) 3/150 (2%)
High troponin AMI 0/8 (0%) 0/2 (0%) 1/35 (2.9%) 1/45 (2.2%)