Weekly influenza update, week 7, February 2018

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Period: 12 Feb 2018 - 18 Feb 2018

Influenza activity was widespread in the majority of reporting countries, with overall 51% of individuals sampled from primary healthcare testing positive for influenza. The detection rate decreased slightly compared to the previous week (53%). Both influenza virus types A and B were co-circulating with a higher proportion of type B viruses. Different proportions of circulating influenza virus types and A subtypes were observed between countries. The majority of severe cases admitted to non-ICU hospital wards were adults infected by influenza type B viruses. The majority of severe cases admitted to ICU were adults infected mostly by influenza type A viruses.

Flu situation report week 7/2018 (12-18 February 2018)

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Summary

Influenza activity was widespread in the majority of reporting countries, with overall 51% of individuals sampled from primary healthcare testing positive for influenza. The detection rate decreased slightly compared to the previous week (53%).

Both influenza virus types A and B were co-circulating with a higher proportion of type B viruses. Different proportions of circulating influenza virus types and A subtypes were observed between countries.

The majority of severe cases admitted to non-ICU hospital wards were adults infected by influenza type B viruses. The majority of severe cases admitted to ICU were adults infected mostly by influenza type A viruses.

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