Five years after the peak of the global pandemic, the world continues to grapple with the evolving landscape of Covid-19. The latest twist comes from the United Kingdom, where a new strain dubbed ‘Stratus’ has rapidly become the most prevalent variant, accounting for nearly a third of all cases in England. What sets Stratus apart is not just its speed of spread, but a unique and unexpected symptom, a hoarse voice.

With experts warning of increased immune evasion and the World Health Organization (WHO) keeping the strain under close surveillance, the emergence of Stratus and its sub-variants XFG and XFG.3 is a timely reminder that the fight against Covid-19 is far from over.

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What Is New Covid Variant Stratus?

First identified in January 2025, the Stratus strain—officially classified under the XFG lineage and its subvariant XFG.3—has become the most common form of COVID-19 in England. According to the UK Health Security Agency (UKHSA), the XFG.3 variant currently accounts for a greater proportion of cases than any other single strain, with Stratus overall making up roughly 30% of infections in the region.

The World Health Organization (WHO) has designated Stratus as a "variant under monitoring," a classification that signals the need for heightened genomic tracking, though it has emphasized the variant currently poses a low risk to global public health.

What sets Stratus apart from prior variants, particularly its Omicron predecessors, is a peculiar but increasingly common symptom: a hoarse or raspy voice, an anomaly not prominently associated with COVID-19 strains before.

Dr. Alex Allen, Consultant Epidemiologist at UKHSA, emphasizes that while viruses naturally mutate over time, the Stratus strain’s unique symptom profile and rapid spread warrant careful monitoring.

Stratus is not just another offshoot of Omicron; it is what scientists call a “recombinant” or “Frankenstein” variant. This means it emerged when an individual was infected with two different Covid strains simultaneously, resulting in a new hybrid lineage. Such recombination events are rare but can lead to variants with novel characteristics—including changes in transmissibility, immune evasion, and symptomatology.

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Reports from the World Health Organization indicate that Stratus is showing signs of additional immune evasion compared to other strains. This means it may more effectively bypass existing immunity from previous infections or vaccinations, contributing to its rapid spread.

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How Widespread Is Stratus Globally?

As of June 22, 2025, Stratus has been detected in 38 countries, according to the World Health Organization. In addition to its prevalence in the UK, it is showing a slow but steady increase in several regions across Southeast Asia and Europe, and health authorities in the United States are closely monitoring imported cases.

The WHO noted that several nations have reported rising case counts and mild upticks in hospitalization rates alongside increased detection of XFG. However, current evidence does not indicate that Stratus causes more severe illness or higher mortality than other circulating Omicron variants.

As of late June 2025, Stratus accounted for 22.7 percent of global Covid-19 cases, according to the WHO. It has been detected in 38 countries, reflecting its global reach. The UK remains the epicenter, but rising case numbers have also been reported in South-East Asia, Australia, and several U.S. states.

The true scale of the spread, however, is difficult to measure. With widespread reductions in Covid-19 testing compared to the height of the pandemic, many cases may go undetected or unreported. This underlines the importance of genomic surveillance and international cooperation in tracking emerging variants.

Recognizing the Symptoms of Stratus Strain

While the hoarse voice is the most distinctive symptom reported with Stratus, health authorities have not yet listed any other unique symptoms for this variant. The classic symptoms of Covid-19—including fever, persistent cough, loss of taste or smell, fatigue, headache, and sore throat—remain common.

The NHS continues to advise the public to watch for:

• High temperature or shivering
• New, continuous cough
• Shortness of breath
• Loss or change in sense of smell or taste
• Feeling tired or exhausted
• Aching body
• Headache
• Sore throat
• Blocked or runny nose
• Loss of appetite
• Diarrhea
• Nausea or vomiting

The emergence of a hoarse voice as a prominent symptom highlights the need for ongoing vigilance and public awareness, especially as new variants may present in unexpected ways.

Is Stratus Variant More Dangerous?

So far, there is no evidence that Stratus causes more severe disease than previous variants. Dr. Alex Allen, Consultant Epidemiologist at UKHSA, stated that the agency continues to monitor the situation closely, adding, “It is normal for viruses to mutate and change over time.”

Dr. Allen also emphasized that COVID-19 vaccines in use remain effective against Stratus and its subvariants. While Stratus shows signs of “immune evasion,” experts clarify this doesn’t mean existing immunity—whether from vaccination or prior infection—is rendered useless. Instead, it may suggest slightly reduced protection against infection, not against severe illness.

The UK and many other countries continue to offer seasonal COVID-19 booster doses, especially for vulnerable groups. In the UK, the NHS is currently offering the vaccine to:

• Individuals aged 75 and above
• People aged 6 months to 74 with weakened immune systems
• Residents in adult care homes

The rationale remains the same: over time, vaccine-induced immunity wanes, and booster doses "top up" protection, reducing the risk of severe symptoms, hospitalization, and death.

As of now, there is no need for a new vaccine targeting Stratus, but virologists remain vigilant. The adaptability of mRNA vaccine platforms allows manufacturers to update formulations quickly, should a variant emerge that significantly escapes immunity.

While the Stratus strain doesn’t appear to be more deadly or vaccine-resistant, it’s a clear reminder that COVID-19 is not behind us. The virus continues to mutate, and new symptoms—like a hoarse voice—may require clinicians and patients to adjust their awareness of what infection might look like.

Public health experts advise individuals to stay up to date with vaccines, test if symptomatic (especially if vulnerable or in contact with high-risk individuals), and continue practicing good hygiene, particularly in crowded indoor spaces.

For years, people living with chronic fatigue syndrome (ME/CFS), also known as myalgic encephalomyelitis, have struggled to confirm whether they actually have the condition or to recognise its full range of symptoms. Diagnosis has largely depended on ruling out other illnesses such as thyroid problems, anaemia, or depression. As a result, patients have often faced years of uncertainty or received incorrect diagnoses. Now, in a promising scientific development, researchers have identified a blood test that may detect chronic fatigue syndrome with an accuracy rate of 96%.

What Is Chronic Fatigue Syndrome?

Chronic Fatigue Syndrome (CFS), also referred to as Myalgic Encephalomyelitis (ME/CFS), is a long-term, multifaceted illness that leaves sufferers drained of energy in ways that ordinary rest cannot fix. According to the National Institutes of Health, this fatigue deepens after even light physical or mental effort—a hallmark called post-exertional malaise. Many cases worsen because the illness remains unrecognised for years. Gaps in medical training, limited awareness, and confusion about how to identify and manage the disease have all contributed to poor outcomes for patients.

Chronic Fatigue Syndrome Symptoms

The U.S. Centers for Disease Control and Prevention (CDC) lists several key symptoms of ME/CFS. These include severe tiredness that does not ease with rest, exhaustion after any activity (post-exertional malaise), unrefreshing sleep, pain in muscles or joints, headaches, and problems with memory or concentration. Other frequently reported signs are a persistent sore throat, tender lymph nodes, and feeling faint or dizzy when standing.

Additional symptoms that can appear include:

• Flu-like sensations, fever, or chills
• Mood changes such as anxiety, irritability, or depression
• Digestive problems
• Sensitivity to food, smells, or chemicals
• Rapid or irregular heartbeat

Breakthrough Blood Test Can Now Detect Chronic Fatigue Syndrome

A group of researchers from the University of East Anglia (UEA) working with Oxford BioDynamics believe they have overcome one of the biggest hurdles in diagnosing ME/CFS. Their goal was to create a dependable blood-based test capable of identifying consistent biological differences between people with ME/CFS and those without it. To do this, they turned to EpiSwitch 3D Genomics, a technology that studies how DNA folds inside cells. The way DNA loops or folds affects which genes are active, even when the genetic sequence itself remains unchanged.

The study examined blood samples from 47 people with severe ME/CFS and 61 healthy participants. Researchers looked for distinct DNA “folding signatures” that appeared consistently in patients but not in healthy controls. Their findings showed that the test could identify ME/CFS with about 96% accuracy, though individual reports of this figure vary slightly.

If future research confirms these results, this could represent a turning point in how the illness is recognised and treated. A reliable biomarker could help patients receive earlier diagnoses and enable scientists to design better therapies. However, experts urge caution. Independent testing across larger and more diverse groups is crucial before it becomes part of clinical practice.

The discovery is an encouraging advance, but it is still early. For now, the EpiSwitch blood test stands as a hopeful sign, one that brings ME/CFS research closer to validation, but not yet to medical routine.

Nobel Peace Prize 2025: It was 1am at night, when Mary Brunkow's phone began to ring, assuming it to be a spam call, she put it on "do not disturb" and went back to sleep. Her husband too ignored the rings, only to be woken up along with their dog a few minutes later, when the Associated Press photographer showed up at their door. This is when Brunkow realized that she had won a Nobel Prize.

Brunkow along with two other scientists Fred Ramsdell and Shimon Sakaguchi had won the Nobel Prize "for their discoveries concerning peripheral immune tolerance".

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What Is " peripheral immune tolerance"?

It refers to the mechanisms by which the immune system prevents self-reactive immune cells, especially the T-cells from attacking healthy tissues once they are already in the body's circulation.

The three are award for their work that revealed the existence and function of these special class of T-cell, called the regulatory T-cells, which act as brakes on immune responses, preventing autoreactivity. They also discovered the gene FOXP3, whose proper function is essential to the development and operation of regulatory T-cells. Their discovery revealed that mutation in FOXP3 genes is what leads to serious autoimmune disorders.

How Did The Discovery Happen?

Long before FOXP3, Sakaguchi, who is a professor at Osaka University in Japan, resurrected and rigorously defined the concept of regulatory T cells, also called Tregs. In 1995, he published work that showed that a subset of T-cells marked by CD25 along with CD4 could suppress autoimmune responses in mice. Those cells would be later called as the regulatory T-cell. It was his discovery which became the "brake" the immune system needed.

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Why Does This Discovery Matter?

Before Sakaguchi's work, the existence of regulatory T-cells was speculative, even controversial. The idea was dismissed because the evidence was murky. His work also opened the possibility that one day we may enhance regulatory T-cell functions in autoimmune diseases or inhibit it in cancer settings.

What Did Brunkow and Ramsdell Do?

While Sakaguchi defined the Treg population, Brunkow and Ramsdell filled the gap by discovering FOXP3, the gene whose expression is necessary for Treg development.

They studied that in mice, a peculiar strain known as "scurfy" mice, spontaneously developed lethal autoimmunity, which was manifested by scaly, flaky skin, enlarged lymph nodes and spleens, and early death. They showed that the scurfy phenotype is caused by a mutation on the X chromosome in a previously unknown gene which they named FOXP3.

Their discovery also showed that in humans, a rare autoimmune syndrome called IPEX, which is characterized by immune dysregulation, polyedendocrinopathy, entropathy, X-linked inheritance is caused by mutations in the human equivalent, FOXP3. They thus, directly connected the mouse mutation and human disease that proved that FOXP3 is central to immune self-tolerance.

Without functional FOXP3, regulatory T-cells fail to form or function, and immune system launches damaging attacks on normal tissues.

What Comes Next?

Their discovery is important as it can be used to treat autoimmune diseases like Type 1 diabetes, systemic lupus erythematosus, rheumatoid arthritis, multiple sclerosis, and many more.

The scope for cancer immunotherapy and tolerance during organ transplantation also broadens with the discovery. As with the FOXP3, it becomes possible to design therapies that block Treg suppression locally, enabling the immune system to better recognize and attack tumors. In terms of organ transplantation, with Tregs, it may become feasible to engineer Tregs that home to transplanted organs and locally suppress rejection.

The Nobel press release and news sources note that more than 200 clinical trials are already underway based on regulatory T cell / peripheral tolerance ideas.

A recent report from Santé publique France highlights a significant rise in suspected COVID-related visits to emergency departments across the country during the week of September 15–21, 2025 (week 37). Compared with the previous week (September 8–14, week 36), hospital visits linked to COVID increased by 43% among children under 15, with 156 additional visits, and by 29% among adults, with 224 more visits.

Cases among adults had already started climbing the week before. This surge comes as a new SARS-CoV-2 variant, nicknamed “Frankenstein,” becomes increasingly common in France. Here is everything you need to know about this variant, its symptoms, and how to protect yourself.

What Is the Frankenstein Variant?

According to the World Health Organization (WHO), this rise is associated with the emergence of a new variant called XFG. It is nicknamed “Frankenstein” because it is a recombinant, meaning it contains genetic material from two different COVID-19 subtypes, LF.7 and LP.8.1.2. The WHO has classified XFG as a variant under monitoring since June 25, 2025, and it is spreading in several countries worldwide. Current evidence suggests that the public health risk remains low, and approved COVID vaccines are expected to continue preventing severe disease and symptomatic infection. Countries in Southeast Asia have also reported increases in both new cases and hospitalisations in areas where XFG has been widely detected.

Although XFG appears to spread more easily than other variants, experts say it does not seem to cause more severe illness. “The vast majority of infections are mild and resolve within a few days with rest,” said Dr. Gérald Kierzek. Infectious disease specialist Anne-Claude Crémieux added that, so far, there are no signs the variant is more dangerous than previous strains.

Symptoms of the Frankenstein Variant

The symptoms of XFG are similar to those seen with previous COVID-19 variants and are generally mild, resembling a common cold. These may include:

• Sore throat
• Runny or congested nose
• Dry cough
• Fatigue and muscle aches
• Mild fever
• Loss of appetite

Why Is The Variant Called Frankenstein?

The nickname “Frankenstein” reflects the variant’s hybrid nature, as it combines genetic material from multiple COVID-19 subtypes.

Frankenstein Covid Variant: Preventing Infection and Managing Symptoms

There is no treatment specific to XFG, so care follows the same principles used for other COVID variants.

• Vaccination: Current COVID vaccines remain highly effective at preventing severe illness and hospitalisation, even if protection against infection may be slightly reduced.
• Symptom relief: Rest, hydration, fever reducers, and cough medicines can help manage mild symptoms.
• Protective measures: Wearing masks, maintaining hand hygiene, social distancing, and avoiding crowded places remain important.

Research on the Frankenstein variant is ongoing. Since the disease can affect individuals differently, taking personal precautions and consulting a doctor when symptoms appear remain essential.