Table 4. Characteristics of individuals with developing symptoms upon entry and identified as having Pandemic (H1N1) 2009 by enhanced surveillance afterwards (n = 24).
| Case | Age | Sex | Arrival date | Onset date | Days from arrival to onset* | Affected country visited | Body temperature at entry screening (°C) | Contents of health declaration form completed on arrival | Rapid influenza diagnostic test at entry screening | Symptoms on arrival revealed by enhanced surveillance |
| 1 | 17 | F | May 19 | May 19 | 0 | USA** | 37.8 | Negative | Cough, sore throat, nasal obstruction | |
| 2 | 17 | F | May 19 | May 19 | 0 | USA | 39.2 | Negative | Sore throat | |
| 3 | 21 | F | May 29 | May 29 | 0 | USA | 38.8 | Negative | Cough | |
| 4 | 26 | F | May 31 | May 31 | 0 | Canada | Cough | N/A | Cough | |
| 5 | 36 | M | Jun 2 | Jun 2 | 0 | USA | 37.2 | Cough, nasal discharge, antipyretic | N/A | Cough |
| 6 | 29 | F | Jun 4 | Jun 4 | 0 | USA | No symptoms | N/A | Cough | |
| 7 | 32 | F | Jun 6 | Jun 6 | 0 | USA | Nasal discharge | N/A | Nasal discharge | |
| 8 | 15 | M | Jun 6 | Jun 6 | 0 | Philippines | 40 | N/A | ||
| 9 | 48 | F | Jun 7 | Jun 6 | −1 | USA | Unknown | N/A | Sore throat | |
| 10 | 33 | M | Jun 12 | Jun 11 | −1 | Hawaii | 37- | Unknown | N/A | Cough, sore throat |
| 11 | 15 | F | Jun 13 | Jun 13 | 0 | Australia | 38 | Unknown | N/A | |
| 12 | 27 | M | Jun 14 | Jun 13 | −1 | Hawaii | Unknown | N/A | Cough, nasal discharge, nausea | |
| 13 | 41 | M | Jun 14 | Jun 14 | 0 | Philippines | 39 | No symptom | N/A | |
| 14 | 29 | F | Jun 14 | Jun 14 | 0 | USA | 37.3 | Unknown | Negative | |
| 15 | 44 | M | Jun 16 | Jun 16 | 0 | Philippines | No symptom | N/A | Cough | |
| 16 | 14 | M | Jun 16 | Jun 12 | −4 | USA | Unknown | N/A | Cough, sore throat | |
| 17 | 44 | M | Jun 16 | Jun 16 | 0 | Philippines | 38.7 | Cough, nasal discharge | N/A | Cough, nasal discharge |
| 18 | 62 | M | Jun 16 | Jun 14 | −2 | Philippines | 38 | Cough | N/A | Cough |
| 19 | 31 | F | Jun 16 | Jun 16 | 0 | USA | 38 | Unknown | N/A | Sore throat |
| 20 | 37 | F | Jun 16 | Jun 16 | 0 | USA | 38 | Unknown | N/A | |
| 21 | 38 | F | Jun 16 | Jun 16 | 0 | USA | >38 | Unknown | Negative | |
| 22 | 3 | F | Jun 17 | Jun 16 | −1 | USA | 38.5 | Unknown | N/A | |
| 23 | 25 | F | Jun 17 | Jun 14 | −3 | Hawaii | 38.5 | Cough | N/A | Cough |
| 24 | 28 | F | Jun 18 | Jun 15 | −3 | Hawaii | Unknown | N/A | + |
Notes: Cases 11 and 13 were detected with an infrared thermoscanner.
Case 8 and 13, Dengue fever was suspected and a test for Dengue was performed.
Case 22 had been negative on a rapid influenza diagnostic test performed in the U.S.
*Days from arrival to onset are expressed as 0 for the day of arrival, as minus number of days for previous days, and as plus number of days for following days.
**USA refers to mainland U.S.