- A recent rise in COVID-19 cases has been associated with a new Omicron subvariant XFG, commonly referred to as “Stratus.”
- Updated CDC data suggest that “Stratus” is now the predominant variant circulating in the United States.
- As of August 5, CDC figures show that COVID-19 cases are increasing across 45 states.
- With evolving COVID-19 vaccine recommendations,recognizing how the illness presents can help reduce spread and protect vulnerable individuals.
According to forecasting models from the Centers for Disease Control and Prevention (CDC), COVID-19 infection rates are rising in at least 45 states. Public health experts are closely monitoring these trends as communities navigate late-summer increases in respiratory illnesses.
This seasonal upswing appears to be driven largely by a newer Omicron subvariant, XFG, informally named the “Stratus” variant. As discussions around COVID Stratus symptoms 2025 gain attention, many people are seeking clear guidance on how this strain compares with prior variants and what warning signs to watch for.
Initially identified in January in Southeast Asia, the XFG variant subsequently spread internationally. By June, XFG had been detected in 38 countries and was responsible for 22% of reported COVID-19 cases. The World Health Organization (WHO) categorized it as a “variant under monitoring,” reflecting its growing global presence.
By August 13, CDC wastewater surveillance data showed that “Stratus” had become the predominant variant in circulation. At the same time, the Omicron variant NB.1.8.1, or “Nimbus,” recognized for its so-called “razor blade throat” symptom, continues to account for a significant proportion of cases, according to the CDC.
Recent CDC data further indicate that COVID-19 test positivity rates have climbed by 8.6%. Despite this increase, hospitalizations related to the respiratory illness remain comparatively low, suggesting that while transmission is higher, severe outcomes are less frequent than in earlier pandemic waves.
Increases in SARS-CoV-2 transmission are often fueled by mutations that enhance contagiousness, combined with waning immunity from prior infection or vaccination. As population-level protection shifts over time, periodic surges can be expected.
“We are settling into COVID being a more seasonal respiratory virus,” said Rishi Khakhkhar, MD, Chief Medical Officer at Counsel Health and an emergency physician at Mount Sinai.
“This will come with upticks of infections and, unfortunately, hospitalizations, though severe disease is much less common than in the initial waves of the pandemic because the vast majority of Americans have had COVID at least once by now,” Khakhkhar told HealthEH.
Access to COVID-19 shots may be limited
Although currently available COVID-19 vaccines may still provide protection against emerging variants, including XFG, recent public health policy changes could affect availability for some groups.
For example, Health and Human Services (HHS) Secretary Robert F. Kennedy Jr. recently withdrew $500 million in funding allocated for mRNA vaccine development programs.
Earlier this spring, the Health Secretary also announced that the CDC will no longer recommend COVID-19 vaccines for pregnant people and young children. In addition, the Food and Drug Administration (FDA) will no longer approve updated COVID-19 vaccines for individuals under age 65.
However, a paper published in the New England Journal of Medicine notes that exceptions will be granted for children and adults who have at least one underlying health condition that increases their risk of severe illness from COVID-19.
“High-risk and immunocompromised individuals in particular should make sure to stay current on the latest COVID vaccination,” Khakhkhar advised.
For those concerned about evolving recommendations, speaking with a healthcare professional can help clarify eligibility, especially for people with chronic conditions, weakened immune systems, or advanced age.
Symptoms of ‘Stratus,’ other Omicron variants
Many people researching COVID Stratus symptoms 2025 want to know whether this variant causes different signs of illness compared with earlier strains. In most cases, COVID-19 symptoms continue to resemble those of other common respiratory infections, such as influenza, though the presentation can vary widely from person to person.
Monica Gandhi, MD, MPH, a professor of medicine at the University of California, San Francisco, explained that symptoms linked to evolving Omicron subvariants remain largely consistent with previous SARS-CoV-2 strains.
“There is no evidence that the symptoms caused by [new variants] differ from the symptoms caused by other Omicron subvariants,” Gandhi said. “The symptoms seem to be the same as with other recent subvariants of Omicron.”
A 2020 study suggested that COVID-19 symptoms may initially follow a particular sequence. However, as the virus has mutated, the clinical presentation has become more variable, making it harder to predict a uniform pattern of onset.
Common upper respiratory tract symptoms may include:
- fever
- coughing
- sneezing
- runny nose
Additional frequently reported symptoms include headache and muscle or body aches. Some individuals may also experience gastrointestinal symptoms such as nausea, vomiting, or diarrhea. Fatigue and sore throat are also commonly described with Omicron subvariants.
If you develop these symptoms and test positive for COVID-19, you may have contracted one of the newer subvariants, including XFG. Reviewing trusted resources on Covid Stratus symptoms can help you better understand what to expect and when to seek care. Informing recent close contacts is also an important step in limiting further transmission.
For most otherwise healthy individuals, COVID-19 symptoms resolve on their own without the need for prescription treatment. Supportive care strategies may include:
- getting adequate rest
- drinking plenty of fluids to stay hydrated
- using over-the-counter pain relievers and fever reducers as directed
Monitoring symptoms closely is important. If your condition does not improve or worsens, consult a healthcare professional. If you are within five days of symptom onset, a clinician may prescribe the antiviral therapy Paxlovid to reduce the risk of progression to severe disease.
In more serious cases of COVID-19 infection, hospitalization may be necessary, particularly if breathing difficulties or low oxygen levels develop.
Gandhi emphasized that immunocompromised individuals, older adults, and those without prior immunity may face a higher risk of lower respiratory tract complications such as pneumonia. Anyone who is immunocompromised and tests positive for COVID-19 should seek medical evaluation promptly, even if initial symptoms appear mild.
Another common question is How long does Stratus COVID last. While duration varies, many people experience mild to moderate symptoms for several days to a couple of weeks, with gradual improvement. Persistent or worsening symptoms warrant medical assessment to rule out complications.
Should you be concerned about new COVID variants?
For children and adults who have been vaccinated against COVID-19, protection against severe illness from Omicron subvariants — including “Stratus” — remains strong. While breakthrough infections can occur, vaccines continue to reduce the likelihood of hospitalization and death.
The WHO recommends updated COVID-19 vaccination for immunocompromised individuals, people with multiple comorbidities, and adults age 65 and older.
“I am not very concerned about the new variant because COVID-19 is not an eradicable virus, so we will always see new subvariants,” Gandhi said.
“However, we have high rates of population immunity in the United States at this time. Memory B cells — generated by the vaccines or as a result of a prior infection — have been shown to recognize the virus, including its variants. Specifically, if memory B cells see a variant, they are able to make antibodies adapted to the variant or subvariant,” she explained.
Gandhi added that both COVID-19 vaccination and prior infection stimulate the development of T cells.
“B cells serve as memory banks to produce antibodies when needed [and] T cells both help B cells make antibodies and help recruit cells to attack the pathogen directly. T cell immunity from the vaccines remains protective across variants, ‘from alpha to Omicron.’ Our T cell response, even across a mutated spike protein, is so robust that we have not seen Omicron yet able to evade the many T cells that descend upon the mutated virus to fight severe disease,” Gandhi concluded.
As public health guidance evolves, staying informed about COVID Stratus symptoms 2025, vaccination eligibility, and early treatment options can help individuals make proactive decisions to safeguard their health and the well-being of those around them.
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