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KMID : 1143420200130483408
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Public Health Weekly Report
2020 Volume.13 No. 48 p.3408 ~ p.3419
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Influenza Sentiel Surveillance Report in the Republic of Korea, 2019-2020
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Cheun Hyeng-Il
Song Jeong-Suk
Park Su-Jin
Lee Dong-Han
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Abstract
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Influenza, commonly known as ‘the flu’ is a disease caused by an influenza virus. The aim of this report was to provide the results of the 2019-2020 influenza sentinel surveillance and to make recommendations on controlling and preventing influenza. During the 2019-2020 influenza season in the Republic of Korea (ROK), influenza-like illness (ILI) surveillance was performed at 199 private clinics, and influenza virus laboratory surveillance was performed at 52 of these clinics. In addition, surveillance for confirmed influenza inpatients was conducted in 215 hospitals with more than 200 beds. The reporting rates for ILI and inpatient surveillance were 98% and 95%, respectively.
The ILI consultation rates were above the baseline (5.9/1,000 outpatients) for 20 weeks of the 2019-2020 influenza season (November 15, 2019-March 27, 2020), which was 12 weeks shorter than the previous influenza season. The peak ILI rate of 49.8 (/1,000 outpatients) was reported at week 52 (December 22-December 28, 2019) and was lower than the peak ILI rate of 73.3 (/1,000 outpatients) of the last season. There were no secondary epidemics in the spring of the 2019-2020 influenza season.
The report found that among the 7-12 age group, the epidemic occurred more rapidly and higher than among other age groups. The number of confirmed influenza inpatients was highest at week 2 in 2020 (January 5-January 11, 2020), two weeks after the peak ILI rate.
According to the findings, in the 2019-2020 influenza season, the influenza epidemic decreased earlier than in previous years. Cough etiquette, hand hygiene and social distancing for prevention of the COVID-19 were presumed to be the factors for the lower influenza epidemic than previous seasons. Influenza is prevalent from winter to spring that causes a substantial disease burden on people in Korea every year. In order to recognize the epidemic early and prevent large outbreaks, a continuous surveillance system, vaccination, hand washing, and prevention activities such as cough etiquette are necessary.
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KEYWORD
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Influenza, Influenza-like illness, Influenza sentinel surveill
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