1887
Surveillance Open Access
Like 0

Abstract

Background

In mid-March 2020, a range of public health and social measures (PHSM) against the then new coronavirus disease (COVID-19) were implemented in Denmark, Norway and Sweden.

Aim

We analysed the development of influenza cases during the implementation of PHSM against SARS-CoV-2 in the Scandinavian countries.

Method

Based on the established national laboratory surveillance of influenza, we compared the number of human influenza cases in the weeks immediately before and after the implementation of SARS-CoV-2 PHSM by country. The 2019/20 influenza season was compared with the five previous seasons.

Results

A dramatic reduction in influenza cases was seen in all three countries, with only a 3- to 6-week duration from the peak of weekly influenza cases until the percentage dropped below 1%. In contrast, in the previous nine influenza seasons, the decline from the seasonal peak to below 1% of influenza-positive samples took more than 10 weeks.

Conclusions

The PHSM against SARS-CoV-2 were followed by a dramatic reduction in influenza cases, indicating a wider public health effect of the implemented measures.

Loading

Article metrics loading...

/content/10.2807/1560-7917.ES.2021.26.22.2001160
2021-06-03
2021-09-28
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2021.26.22.2001160
Loading
Loading full text...

Full text loading...

/deliver/fulltext/eurosurveillance/26/22/eurosurv-26-22-2.html?itemId=/content/10.2807/1560-7917.ES.2021.26.22.2001160&mimeType=html&fmt=ahah

References

  1. European Centre for Disease Prevention and Control (ECDC). Risk assessment: Outbreak of acute respiratory syndrome associated with a novel coronavirus, Wuhan, China; first update. Stockholm: ECDC; 2020. Available from: https://www.ecdc.europa.eu/en/publications-data/risk-assessment-outbreak-acute-respiratory-syndrome-associated-novel-coronavirus
  2. World Health Organisation (WHO). Novel coronavirus (2019-nCoV) situation report 1. Geneva: WHO; 2020. Available from: https://www.who.int/docs/default-source/coronaviruse/situation-reports/20200121-sitrep-1-2019-ncov.pdf
  3. Bernard Stoecklin S, Rolland P, Silue Y, Mailles A, Campese C, Simondon A, et al. First cases of coronavirus disease 2019 (COVID-19) in France: surveillance, investigations and control measures, January 2020. Euro Surveill. 2020;25(6):2000094.  https://doi.org/10.2807/1560-7917.ES.2020.25.6.2000094  PMID: 32070465 
  4. Spiteri G, Fielding J, Diercke M, Campese C, Enouf V, Gaymard A, et al. First cases of coronavirus disease 2019 (COVID-19) in the WHO European Region, 24 January to 21 February 2020. Euro Surveill. 2020;25(9):2000178.  https://doi.org/10.2807/1560-7917.ES.2020.25.9.2000178  PMID: 32156327 
  5. Eurosurveillance editorial team. Updated rapid risk assessment from ECDC on the novel coronavirus disease 2019 (COVID-19) pandemic: increased transmission in the EU/EEA and the UK. Euro Surveill. 2020;25(10):2003121. PMID: 32183937 
  6. European Centre for Disease Prevention and Control (ECDC). COVID-19 situation update for the EU/EEA and the UK, as of 8 October 2020. Stockholm: ECDC; 2020. Available from: https://www.ecdc.europa.eu/en/covid-19/situation-updates
  7. European Centre for Disease Prevention and Control (ECDC). Rapid risk assessment: Coronavirus disease 2019 (COVID-19) in the EU/EEA and the UK – ninth update, 23 April 2020. Stockholm: ECDC; 2020. Available from: https://www.ecdc.europa.eu/en/publications-data/rapid-risk-assessment-coronavirus-disease-2019-covid-19-pandemic-ninth-update
  8. Voldstedlund M, Haarh M, Mølbak K, MiBa Board of Representatives. The Danish Microbiology Database (MiBa) 2010 to 2013. Euro Surveill. 2014;19(1):20667.  https://doi.org/10.2807/1560-7917.ES2014.19.1.20667  PMID: 24434175 
  9. Svensk författningssamling (SFS). Förordning om ändring i smittskyddsförordningen (2004:255). [Ordinance amending the Communicable Diseases Ordinance (2004: 255)]. Stockholm: SFS; 2015. Swedish. Available from: http://rkrattsdb.gov.se/SFSdoc/15/150587.PDF
  10. European Centre for Disease Prevention and Control (ECDC)–World Health Organization Regional Office for Europe (WHO/Europe). Flu News Europe - Joint ECDC–WHO/Europe weekly influenza update. Stockholm-Copenhagen: ECDC–WHO/Europe. [Accessed: 2 June 2021]. Available from: http://flunewseurope.org/
  11. Olsen SJ, Azziz-Baumgartner E, Budd AP, Brammer L, Sullivan S, Pineda RF, et al. Decreased Influenza Activity During the COVID-19 Pandemic - United States, Australia, Chile, and South Africa, 2020. MMWR Morb Mortal Wkly Rep. 2020;69(37):1305-9.  https://doi.org/10.15585/mmwr.mm6937a6  PMID: 32941415 
  12. Cowling BJ, Ali ST, Ng TWY, Tsang TK, Li JCM, Fong MW, et al. Impact assessment of non-pharmaceutical interventions against coronavirus disease 2019 and influenza in Hong Kong: an observational study. Lancet Public Health. 2020;5(5):e279-88.  https://doi.org/10.1016/S2468-2667(20)30090-6  PMID: 32311320 
/content/10.2807/1560-7917.ES.2021.26.22.2001160
Loading

Data & Media loading...

Submit comment
Close
Comment moderation successfully completed
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error