Chile Braces for Rising Respiratory Virus Cases: Rhinovirus and COVID-19 Lead the Charge
Chile is experiencing a sustained increase in circulating respiratory viruses, setting the stage for a potentially challenging period for public health. Recent reports from the Public Health Institute (ISP) indicate a significant rise in positive test results, with rhinovirus currently dominating, followed closely by SARS-CoV-2.
Viral Positivity Rates Surge
Analysis of 2,622 samples revealed that 978 tested positive for a virus, resulting in an overall positivity rate of 37.3%. This represents a notable increase from the previous week’s 26.9%, signaling a clear upward trend in viral circulation throughout the country.
Rhinovirus Takes the Lead
Currently, rhinovirus accounts for the largest proportion of detected viruses, representing 57.5% of all cases. SARS-CoV-2 follows at 35.2%, with influenza A contributing 8.2% and other respiratory viruses making up the remainder.
“This is typical for this time of year, but it also coincides with the return from vacations, the start of the school year and increased activity in higher education, all of which increase the risk of transmission,” explains Carlos Pérez, an infectious disease specialist at Clínica Universidad de Los Andes and Dean of the Faculty of Medicine at U. San Sebastián. “It’s likely this trend will continue in the coming weeks.”
Rhinovirus: Not Always a Mild Threat
Although historically associated with mild illnesses, the predominance of rhinovirus doesn’t necessarily equate to a minor impact. Experts caution that it can lead to complications in vulnerable populations, particularly young children and individuals with chronic respiratory conditions.
“In reality, at this moment, half of the isolated viruses are rhinoviruses, the classic cause of the common cold, but of course, it can affect some at-risk populations more, such as infants or patients with asthma or chronic obstructive pulmonary disease,” states María Luz Endeiza, head of the Vaccination Center at Clínica Universidad de los Andes.
Age-Related Distribution of Viruses
The distribution of viruses varies by age group. Rhinovirus is more prevalent in young children, while influenza tends to be more common in adults. Whereas a full winter peak hasn’t yet materialized, experts anticipate a progressive increase in cases.
“As the cold weather begins and people gather more in closed, poorly ventilated environments, the transmission of these viruses will increase,” warns Endeiza.
COVID-19 Remains a Concern
Six years after the initial global outbreak, SARS-CoV-2 continues to be a relevant presence. In February, the XFG variant accounted for 99.2% of sequenced cases, demonstrating its dominant circulation.
Unlike other respiratory viruses, “SARS-CoV-2 exhibits a somewhat irregular behavior compared to influenza, as increases in cases have been observed even during the summer months,” explains Roberto Olivares, an infectious disease specialist at Clínica Dávila.
However, the specialist warns that autumn and winter conditions could favor its spread, given the factors that promote transmission during those periods. This is a concern as increased cases could put pressure on the healthcare system and lead to more severe cases in at-risk populations.
Vaccination: A Key Preventative Measure
In light of this scenario, vaccination is highlighted as the primary preventative tool, especially for groups defined by health authorities. “It is very important that all people who belong to the target groups receive their vaccine,” emphasizes Pérez.
Experts reinforce the importance of proactive measures, noting that it takes at least two weeks for immunity to develop after vaccination. Additional non-pharmacological measures, such as ventilating indoor spaces, frequent handwashing, and avoiding unnecessary exposure in at-risk groups, are also recommended.
Protecting the Youngest
For young children, adherence to the National Immunization Program is crucial, providing protection against invasive bacterial diseases and viral infections, according to pediatric infectious disease specialist María Carolina Rivacoba of Clínica Santa María.
The current situation anticipates an active autumn in terms of epidemiology, where a combination of seasonal and behavioral factors once again strains the control of respiratory diseases.
Frequently Asked Questions
Q: What are the most common respiratory viruses circulating in Chile right now?
A: Rhinovirus and SARS-CoV-2 are currently the most prevalent.
Q: Is rhinovirus a serious threat?
A: While typically causing mild colds, rhinovirus can lead to complications in vulnerable groups like young children and those with chronic respiratory illnesses.
Q: What is the best way to protect myself and my family?
A: Vaccination, frequent handwashing, ventilating indoor spaces, and avoiding close contact with sick individuals are key preventative measures.
Q: What variant of COVID-19 is currently dominant in Chile?
A: The XFG variant currently accounts for 99.2% of sequenced cases.
Q: When should I gain vaccinated?
A: It takes at least two weeks for immunity to develop after vaccination, so it’s important to get vaccinated proactively, not wait for a surge in cases.
