Additional Coverage:
New “Stratus” COVID Strain Spreading Rapidly Across U.S.
A new, highly contagious COVID-19 strain, known as XFG or “Stratus,” is rapidly circulating across the United States, coinciding with the onset of cold and flu season. This variant is quickly driving up case numbers by effectively bypassing the body’s immune system, establishing itself as the predominant COVID strain and surpassing NB.1.8.1, or “Nimbus.” Stratus is classified as a hybrid of two Omicron sub-strains.
Understanding the Stratus Variant
Most Stratus cases are reported to be mild, particularly for individuals who are vaccinated. However, the strain possesses a unique mutation that enhances its ability to evade antibodies acquired from previous COVID infections or vaccinations.
The new variant was initially identified in January in Southeast Asia and subsequently in the U.S. in the spring. By June, Stratus had spread to 38 countries, prompting the World Health Organization (WHO) to classify it as a “SARS-CoV-2 variant under monitoring.” The increased COVID transmissions arrive as the U.S. prepares for its annual fall respiratory illness season, which typically sees a rise in cases of the common cold, flu, and respiratory syncytial virus (RSV).
Evolving COVID Vaccine Guidelines
The emergence of Stratus also coincides with updated guidance for COVID vaccines. This cold and flu season marks the first time the U.S. government is not recommending widespread COVID vaccinations.
In August, the U.S. Food and Drug Administration (FDA) approved a new round of COVID vaccines with specific limitations.
Under these new guidelines, the vaccine is authorized for individuals aged 65 and older, who generally face an elevated risk of severe illness from COVID infections. Younger people will only be eligible for the vaccine if they have an underlying medical condition that renders them particularly vulnerable to the virus.
Wastewater Monitoring Reveals Regional Impacts
According to data from September 20 – the latest available from the Centers for Disease Control and Prevention (CDC) – the national level of COVID viral activity in wastewater is “moderate.” The Northeast region currently exhibits the highest level of wastewater viral activity for COVID-19.
What is Wastewater Monitoring?
Wastewater monitoring serves as an early detection system for viruses spreading within a population. Scientists can identify the presence of viruses in wastewater even before community testing becomes widespread, and prior to sick individuals seeking medical attention.
This method can also detect asymptomatic infections. Elevated wastewater viral activity levels suggest a higher potential risk of infection in the community.