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. 2015 May;21(5):741–749. doi: 10.3201/eid2105.141756

Table 2. Surveillance for SARI and ILI and passive surveillance for pneumonia for avian influenza in humans, 4 Southeast Asia countries, April 1, 2013–May 30, 2014*.

Surveillance system No. illnesses meeting case definition Total no. samples tested A(H5N1), no. positive/no. tested A(H7N9), no. positive/no. tested
Vietnam
SARI 11,558 2,485 0/798 0/798
ILI 29,027 3,770 0/0 0/0
Passive surveillance for pneumonia†
238
237
4/70
0/70
Thailand
SARI 1,025 0/106§ 0/106§
ILI 3,850 0/807 0/807
Passive surveillance for pneumonia 157 0/157 0/43
Event-based surveillance 18 outbreaks 162 0/69§ 0/69§
Surveillance for severe or fatal pneumonia
208
208
0/14§
0/14§
Cambodia
SARI 2,282 2,282 7/219 0/0
ILI
1,567
1,567
1/10
0/0
Laos
SARI 1,469 698 0/15 0/15
ILI 8,962 1,550 0/0 0/0

*ILI, influenza-like illness; SARI, severe acute respiratory infection.
†Severe viral pneumonia surveillance system.
‡Total number of illnesses meeting the case definition is unknown for ILI. For SARI, the number of illnesses meeting the case definition is unknown but believed to be close to 100% of persons sampled. Reporting to the passive pneumonia surveillance system is in accordance with physician discretion, and no clear case definition is applied.
§A(H5N1) and A(H7N9) testing is conducted only on specimens positive for influenza A virus.