AI Article Synopsis
- The COVID-19 pandemic led to significant changes in the occurrence of respiratory syncytial virus (RSV) in Gwangju, South Korea, resulting in no RSV during the 2020/2021 season and a three-fold increase in incidence in the 2021/2022 season, especially in children under 5.
- Whole-genome sequencing of RSV samples pre- and post-pandemic showed shifts in lineages, with only the A.D.3.1 lineage found in the 2021/2022 season, while multiple lineages, including A.D.1 and A.D.3, co-circulated in the following season.
- The study emphasizes the importance of ongoing surveillance to understand
Article Abstract
The social restriction measures implemented due to the COVID-19 pandemic have impacted the pattern of occurrences of respiratory viruses. According to surveillance results in the Gwangju region of South Korea, respiratory syncytial virus (RSV) did not occur during the 2020/2021 season. However, there was a delayed resurgence in the 2021/2022 season, peaking until January 2022. To analyze this, a total of 474 RSV positive samples were investigated before and after the COVID-19 pandemic. Among them, 73 samples were selected for whole-genome sequencing. The incidence rate of RSV in the 2021/2022 season after COVID-19 was found to be approximately three-fold higher compared to before the pandemic, with a significant increase observed in the age group from under 2 years old to under 5 years old. Phylogenetic analysis revealed that, for RSV-A, whereas four lineages were observed before COVID-19, only the A.D.3.1 lineage was observed during the 2021/2022 season post-pandemic. Additionally, during the 2022/2023 season, the A.D.1, A.D.3, and A.D.3.1 lineages co-circulated. For RSV-B, while the B.D.4.1.1 lineage existed before COVID-19, both the B.D.4.1.1 and B.D.E.1 lineages circulated after the pandemic. Although atypical RSV occurrences were not due to new lineages, there was an increase in the frequency of mutations in the F protein of RSV after COVID-19. These findings highlight the need to continue monitoring changes in RSV occurrence patterns in the aftermath of the COVID-19 pandemic to develop and manage strategies in response.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11209132 | PMC |
| http://dx.doi.org/10.3390/v16060850 | DOI Listing |
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