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Overview of Current Respiratory Virus Activity
The recent data offers a glimmer of hope as it suggests that the burden on healthcare systems from respiratory viruses may start to recede after weeks of substantial strain. Notably, COVID-19 admissions reduced by nearly 10% in the second week of January. Nonetheless, the fight is far from over, as more than 32,000 people with the virus were still admitted to U.S. hospitals. In the same vein, flu admissions also experienced a decline for the second week straight. However, experts are hesitant to label this as a trend since cases typically escalate again in the latter part of the winter months.
Flu and RSV Activity in the United States
According to the CDC, the seasonal influenza activity remains elevated in most parts of the United States. The influenza A H1N1 pdm09 virus is reported most frequently. The overall percentage of respiratory specimens testing positive for influenza in clinical laboratories has remained stable, with the predominant virus circulating in all regions being influenza A H1N1 pdm09. Also, the U.S. Outpatient Influenza-like Illness Surveillance Network continues to monitor outpatient visits for respiratory illness, including influenza-like illness (ILI).
Respiratory syncytial virus (RSV) activity also remains high in most parts of the country, with some areas starting to see decreases. Despite the decrease in some places, the hospitalization rate among children under 4 remains high at 11.2 per 100,000 population.
Respiratory Virus Landscape in Canada
In week 2 (week ending January 13, 2024) in Canada, RVDSS laboratories reported 5,734 detections of SARS-CoV-2 from 44,057 tests (13.0% positive). Although flu activity is the highest among non-SARS-CoV-2 respiratory viruses, it is on a decreasing trend.
Precautions and Vaccination Rates
With multiple respiratory viruses peaking at once, it is crucial to adhere to precautions such as wearing a mask, staying home when sick, and taking antiviral medications if necessary. Unfortunately, less than half of the US population has received the flu shot this season, and only about one in five adults and fewer than one in ten children have received the latest COVID-19 vaccine. Such low vaccination rates continue to put individuals at risk and add strain to the healthcare system.
Looking Ahead
Although there is a decrease in COVID-19 and flu admissions, it’s too early to predict whether this activity has reached its peak for the season. It’s worth noting that flu and COVID-19-related visits are still increasing among children between the ages of 5 and 11, while decreasing among other age groups. Hence, continuous monitoring, preventive measures, and boosting of vaccination rates remain critical in managing the impact of these respiratory viruses on our healthcare system.
