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 02/2021, 993 SARI cases were reported by 8 countries or areas. Of 405 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 14 670 SARI cases and 3 384 were tested for influenza viruses. Just four specimens from Ukraine, in week 48/2020, have tested positive to date (3 were type B viruses and 1 was type A).