Epidemic Situation

Year: Week:

NATIONAL WEEKLY INFLUENZA BULLETIN OF THE RUSSIAN FEDERATION

week 47 of 2020 (16.11.20 - 22.11.20)

Summary

Influenza and ARI incidence data. Slight decrease of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI and ARI morbidity level (74.3 per 10 000 of population) was higher than national baseline (72.4) by 2.6%.

Etiology of ILI & ARI. Among 2842 investigated patients one (0.04%) respiratory sample positive for influenza unsubtyped A virus was detected.

ARVI detections. The overall proportion of respiratory samples tested positive for other ARVI (PIV, ADV, RSV, RhV, CoV, MPV, BoV) was estimated in total as 6.4% (PCR).

In sentinel surveillance system clinical samples from 55 SARI and 26 ILI/ARI patients were investigated by rRT-PCR, among them no influenza cases recognized. Among 50 SARI cases one (2.0%) case of RhV infection recognized. Among 21 ILI/ARI patients 5 (23.8%) cases were positive for ARVI, including one case of PIV and 4 RhV infection cases. 24 (43.6%) of 55 SARI and 6 (3.1%) of 191 ILI/ARI patients were positive for coronavirus SARS-CoV-2.

COVID-2019. Totally 2 187 990 cases and 38 062 deaths associated with COVID-2019 were registered in Russia including 25 487 cases and 524 deaths in last 24 hours (on 12:00 of 26.11.2020). According to the data obtained by NIC in Saint-Petersburg totally 16 534 clinical samples were PCR investigated in last week. Among them coronavirus SARS-CoV-2 detected in 5182 (31.3%) cases.

Influenza and ARI morbidity data

Fig. 1. Influenza and ARVI morbidity in 61 cities under surveillance in Russia, seasons 2019/20 and 2020/21
Rates per 10 000 populationFig. 1. Influenza and ARVI morbidity in 61 cities under surveillance in Russia, seasons 2019/20 and 2020/21

Weeks

  • Morbidity 2020/21Morbidity 2020/21
  • Morbidity 2019/20Morbidity 2019/20
  • MEM baseline 2020/21MEM baseline 2020/21

Epidemiological data showed slight decrease of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI and ARI morbidity level (74.3 per 10 000 of population) was higher than national baseline (72.4) by 2.6%.

Fig. 2. Comparative data on incidence rate of clinically diagnosed influenza, seasons 2019/20 and 2020/21
Rates per 10 000 populationFig. 2. Comparative data on incidence rate of clinically diagnosed influenza, seasons 2019/20 and 2020/21

Weeks

  • Season 2020/21Season 2020/21
  • Season 2019/20Season 2019/20
  • MEM baselineMEM baseline

Incidence rate of clinically diagnosed influenza decreased comparing to previous week and amounted to 0.00018 per 10 000 of population, it was significantly lower than pre-epidemic MEM baseline (0.061).

Fig. 3. Comparison of hospitalization rate with clinical diagnosis of influenza, seasons 2019/20 and 2020/21
Rates per 10 000 populationFig. 3. Comparison of hospitalization rate with clinical diagnosis of influenza, seasons 2019/20 and 2020/21

Weeks

  • Season 2020/21Season 2020/21
  • Season 2019/20Season 2019/20
  • MEM baselineMEM baseline

Hospitalization rate of clinically diagnosed influenza decreased comparing to previous week and amounted to 0.0 per 10 000 of population.

Influenza and ARVI laboratory testing results

Cumulative results of influenza laboratory diagnosis by rRT-PCR were submitted by 46 RBLs and two WHO NICs. According to these data as a result of 2842 patients investigation one (0.04%) respiratory sample was positive for influenza unsubtyped A virus.

Fig. 4. Geographic distribution of RT-PCR detected influenza viruses in cities under surveillance in Russia, week 47 of 2020
Fig. 4. Geographic distribution of RT-PCR detected influenza viruses in cities under surveillance in Russia, week 47 of 2020
PCR results
  • No dataNo data
  • No viruses detectedNo viruses detected
  • H1pdm09H1pdm09
  • H3H3
  • H3+H1pdm09H3+H1pdm09
  • BB
  • B+H1pdm09B+H1pdm09
  • B+H3B+H3
  • B+H3+H1pdm09B+H3+H1pdm09
  • A (not subt.)A (not subt.)
Fig. 5. Monitoring of influenza viruses detection by RT-PCR in Russia, season 2020/21
Number of positive casesFig. 5. Monitoring of influenza viruses detection by RT-PCR in Russia, season 2020/21% positive

Weeks

  • H1pdm09H1pdm09
  • H3H3
  • BB
  • A (not subt.)A (not subt.)
  • % positive% positive
Fig. 6. Monitoring of ARVI detection by RT-PCR in Russia, season 2020/21
Number of positive casesFig. 6. Monitoring of ARVI detection by RT-PCR in Russia, season 2020/21

Weeks

  • PIVPIV
  • ADVADV
  • RSVRSV
  • RhVRhV
  • CoVCoV
  • MPVMPV
  • BoVBoV

ARVI detections. The overall proportion of respiratory samples tested positive for other ARVI (PIV, ADV, RSV, RhV, CoV, MPV, BoV) estimated as 6.4% of investigated samples by PCR.

Fig. 7. Monitoring of influenza viruses isolation in Russia, season 2020/21
Number of positive casesFig. 7. Monitoring of influenza viruses isolation in Russia, season 2020/21% positive

Weeks

  • H1pdm09H1pdm09
  • H3H3
  • BB
  • % positive% positive

Table 1. Results of influenza and other ARVI detection by RT-PCR in Russia, week 47 of 2020

  Number of  specimens / number of positive cases  % positive
Influenza
Number of specimens tested for influenza 2842 -
Influenza A (not subt.) 1 0,04%
Influenza A(H1)pdm09 0 0,0% 
Influenza A(H3) 0 0,0% 
Influenza B 0 0,0% 
All influenza 1 0,04%
Other ARVI
Number of specimens tested for ARVI 2454  -
PIV 30 1,2%
ADV 20 0,8%
RSV 4 0,2%
RhV 81 3,3%
CoV 11 0,4%
MPV 5 0,2%
BoV 6 0,2%
All ARVI 157 6,4%
SARS-CoV-2 (COVID-19)
Number of specimens tested for SARS-CoV-2 16534 -
SARS-CoV-2 5182 31,3%
Fig. 8. Results of PCR detections of SARS-CoV-2 in Russia
Fig. 8. Results of PCR detections of SARS-CoV-2 in Russia
% positive
  • No dataNo data
  • less then 10%less then 10%
  • 10-20%10-20%
  • 20-30%20-30%
  • 30-40%30-40%
  • 40-50%40-50%
  • 50% and more50% and more

COVID-2019. Totally 2 187 990 cases and 38 062 deaths associated with COVID-2019 were registered in Russia including 25 487 cases and 524 deaths in last 24 hours (on 12:00 of 26.11.2020). According to the data obtained by NIC in Saint-Petersburg totally 16 534 clinical samples were PCR investigated in last week. Among them coronavirus SARS-CoV-2 detected in 5182 (31.3%) cases.

Table 2. Results of influenza viruses isolation in Russia, week 47 of 2020

  Number of specimens / number of viruses  % isolated viruses
Number of specimens 12 -
Influenza A(H1)pdm09 0 0,0% 
Influenza A(H3) 0 0,0% 
Influenza B 0 0,0% 
All influenza 0 0,0%

Sentinel influenza surveillance

Clinical samples from 55 SARI patients were investigated by rRT-PCR for influenza, among them no influenza cases recognized. 50 SARI patients were investigated for ARVI by rRT-PCR, among them one (2.0%) case was positive for RhV infection. 24 (43.6%) of 55 SARI patients were positive for coronavirus SARS-CoV-2.

Clinical samples from 26 ILI/ARI patients were investigated for influenza and ARVI by rRT-PCR, among them no influenza cases recognized. 5 (23.8%) of 21 ILI/ARI patients were positive for ARVI, including one case of PIV and 4 RhV infection cases. 6 (3.1%) of 191 ILI/ARI patients were positive for SARS-CoV2. 

Fig. 9. Monitoring of influenza viruses detection by RT-PCR among SARI patients in sentinel hospitals, season 2020/21
Number of positive casesFig. 9.  Monitoring of influenza viruses detection by RT-PCR among SARI patients in sentinel hospitals, season 2020/21% positive

Weeks

  • H1pdm09H1pdm09
  • H3H3
  • BB
  • A (not subt.)A (not subt.)
  • % positive% positive
Fig. 10. Monitoring of influenza viruses detection by RT-PCR among ILI/ARI patients in sentinel polyclinics, season 2020/21
Number of positive casesFig. 10.  Monitoring of influenza viruses detection by RT-PCR among ILI/ARI patients in sentinel polyclinics, season 2020/21% positive

Weeks

  • H1pdm09H1pdm09
  • H3H3
  • BB
  • A (not subt.)A (not subt.)
  • % positive% positive
Fig. 11. Monitoring of ARVI detection by RT-PCR among SARI patients in sentinel hospitals, season 2020/21
Number of positive casesFig. 11.  Monitoring of ARVI detection by RT-PCR among SARI patients in sentinel hospitals, season 2020/21

Weeks

  • PIVPIV
  • ADVADV
  • RSVRSV
  • RhVRhV
  • CoVCoV
  • MPVMPV
  • BoVBoV
Fig. 12. Monitoring of ARVI detection by RT-PCR among ILI/ARI patients in sentinel polyclinics, season 2020/21
Number of positive casesFig. 12.  Monitoring of ARVI detection by RT-PCR among ILI/ARI patients in sentinel polyclinics, season 2020/21

Weeks

  • PIVPIV
  • ADVADV
  • RSVRSV
  • RhVRhV
  • CoVCoV
  • MPVMPV
  • BoVBoV
Download PDF version