Hospital Surveillance

A subset of countries and areas monitor severe disease related to influenza virus infection by surveillance of


1) hospitalized laboratory-confirmed influenza cases in ICUs or other wards, or


2) severe acute respiratory infection (SARI; countries and areas mostly located in the eastern part of the Region).

Severe acute respiratory infection (SARI)-based hospital surveillance
  • For week 07/2021, 1 489 SARI cases were reported by 10 countries or areas. Of 423 specimens tested for influenza viruses, none were positive.


  • For the season to date, 13 countries and areas (Albania, Armenia, Azerbaijan, Belarus, Bosnia and Herzegovina, Georgia, Kazakhstan, Kosovo (in accordance with UN Security Council resolution 1244 (1999)), Republic of Moldova, Russian Federation, Serbia, Ukraine and Uzbekistan) have reported 26 488 SARI cases and 7 960 were tested for influenza viruses. Ten specimens from Ukraine have tested positive to date (7 were A(H1N1)pdm09 viruses and 3 were type B no lineage ascribed).