SARS-CoV-2 transmission dynamics in Nordic countries

sars cov 2 transmission dynamics in nordic countries

Sumary of SARS-CoV-2 transmission dynamics in Nordic countries:

  • A team of international scientists has recently assessed the strategies adopted by the Nordic countries to curb the trajectory of the coronavirus disease 2019 (COVID-19) pandemic.
  • Their findings reveal that to decrease the transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), it is important to minimize the number, size, and duration of transmission clusters by limiting large-scale gatherings and subsequent mixing of people in the community.
  • Image Credit: Antony McAulay/ Shutterstock Background Despite similar demographics and political structures, the Nordic countries, including Norway, Denmark, Iceland, Finland, and Sweden, had adopted different strategies to control SARS-CoV-2 transmission during the first phase of the pandemic when no vaccines were available.
  • From each alignment, they generated a phylogenetic tree to analyze transmission clusters.
  • The transmission cluster is the monophyletic clustering of more than one viral sequence from the same country.
  • They primarily examined the number of transmission clusters, cluster size (the number of cases in each cluster), and duration of the cluster (the time between the first and last case).
  • In addition, they determined the correlation between cluster size and duration.
  • Important observations Related StoriesComparing cluster numbers between different Nordic countries revealed that Sweden has the highest number of clusters, followed by Denmark, Norway, and Finland.

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