National Weekly Bulletin

NATIONAL WEEKLY INFLUENZA BULLETIN OF THE RUSSIAN FEDERATION

week 40 of 2022 (03.10.22 - 09.10.22)

Summary

Influenza and ARI incidence data. Influenza and other ARI activity decreased of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI and ARI morbidity level (73.2 per 10 000 of population) was higher than national baseline (70.0) by 4.6%.

Etiology of ILI & ARI. Among 3004 investigated patients no respiratory samples positive for influenza 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 17.3% (PCR).

In sentinel surveillance system clinical samples from 61 SARI patients were investigated by rRT-PCR for influenza, among them no positive cases recognized. 48 SARI patients were investigated for ARVI by rRT-PCR, among them 9 (18.8%) cases of ARVI recognized including 3 cases of PIV, 1 case of ADV and 5 cases of RhV infection. 61 SARI patients were investigated for SARS-CoV-2 by rRT-PCR, among them 7 (11.5%) cases of coronavirus SARS-CoV-2 recognized.

Clinical samples from 41 ILI/ARI patients were investigated for influenza by rRT-PCR, among them no positive cases recognized. Among 36 ILI/ARI samples 6 (16.7%) cases positive for ARVI detected including 2 cases of ADV and 4 cases of RhV infection. 41 ILI/ARI patients were investigated for SARS-CoV-2 by rRT-PCR, among them 2 (4.9%) cases of coronavirus SARS-CoV-2 recognized.

COVID-19. Totally 21 264 080 cases and 388 610 deaths associated with COVID-19 were registered in Russia including 15 477 cases and 101 deaths in last 24 hours (on 12:00 of 13.10.2022). According to the data obtained by NIC in Saint-Petersburg totally 14 015 clinical samples were PCR investigated in last week. Among them coronavirus SARS-CoV-2 detected in 1508 (10.8%) cases.

Influenza and ARI morbidity data

Epidemiological data showed decrease of influenza and other ARI activity in Russia in comparison with previous week. The nationwide ILI and ARI morbidity level (73.2 per 10 000 of population) was higher than national baseline (70.0) by 4.6%.

Incidence rate of clinically diagnosed influenza increased comparing to previous week and amounted to 0.0017 per 10 000 of population, it was much lower than pre-epidemic MEM baseline (0.060).

Hospitalization rate of clinically diagnosed influenza increased comparing to previous week and amounted to 0.00074 per 10 000 of population, it was much lower than pre-epidemic MEM baseline (0.040).

Influenza and ARVI laboratory testing results

Cumulative results of influenza laboratory diagnosis by rRT-PCR were submitted by 43 RBLs and two WHO NICs. Among 3004 investigated patients no respiratory samples positive for influenza detected. 

ARVI detections. The overall proportion of respiratory samples tested positive for other ARVI (PIV, ADV, RSV, RhV, CoV, MPV, BoV) estimated as 17.3% of investigated samples by PCR.

Table 1. Results of influenza and other ARVI detection by RT-PCR in Russia, week 40 of 2022

COVID-19. Totally 21 264 080 cases and 388 610 deaths associated with COVID-19 were registered in Russia including 15 477 cases and 101 deaths in last 24 hours (on 12:00 of 13.10.2022). According to the data obtained by NIC in Saint-Petersburg totally 14 015 clinical samples were PCR investigated in last week. Among them coronavirus SARS-CoV-2 detected in 1508 (10.8%) cases.

Table 2. Results of influenza viruses isolation in Russia, week 40 of 2022

Sentinel influenza surveillance

Clinical samples from 61 SARI patients were investigated by rRT-PCR for influenza, among them no positive cases recognized. 48 SARI patients were investigated for ARVI by rRT-PCR, among them 9 (18.8%) cases of ARVI recognized including 3 cases of PIV, 1 case of ADV and 5 cases of RhV infection. 61 SARI patients were investigated for SARS-CoV-2 by rRT-PCR, among them 7 (11.5%) cases of coronavirus SARS-CoV-2 recognized.

Clinical samples from 41 ILI/ARI patients were investigated for influenza by rRT-PCR, among them no positive cases recognized. Among 36 ILI/ARI samples 6 (16.7%) cases positive for ARVI detected including 2 cases of ADV and 4 cases of RhV infection. 41 ILI/ARI patients were investigated for SARS-CoV-2 by rRT-PCR, among them 2 (4.9%) cases of coronavirus SARS-CoV-2 recognized.