As 2025 progresses, new COVID-19 variants are circulating, bringing with them a mix of familiar and new symptoms. Health experts are closely monitoring these evolving strains and are encouraging the public to remain vigilant, especially as some variants show a high rate of transmission.
While core symptoms like fever, cough, and fatigue are still common, two new variants, known as "Nimbus" (NB.1.8.1) and "Stratus" (XFG), have been identified with some unique characteristics.
"Razor Blade Throat" and "Hoarse Voice": Symptoms of New Variants
The Nimbus variant has become known for a symptom described as "razor blade throat"—a severe and painful sore throat. This is thought to be a result of the variant’s spike protein attaching more effectively to receptors in the upper airway.
The Stratus variant, also being tracked by the World Health Organization (WHO), is noted for an early sign: a hoarse or raspy voice. This voice change may appear before other typical COVID-19 symptoms, such as body aches or fever.
Traditional Symptoms Still Present
Despite the emergence of these new variants, many of the classic COVID-19 symptoms are still prevalent. The Centers for Disease Control and Prevention (CDC) and other health organizations continue to list a wide range of symptoms that can differ from person to person. These include:
* Fever or chills
* Cough
* Shortness of breath or difficulty breathing
* Sore throat
* Congestion or runny nose
* New loss of taste or smell
* Fatigue
* Muscle or body aches
* Headache
* Nausea or vomiting
* Diarrhea
It's important to remember that many people may have very mild symptoms or be asymptomatic, yet can still spread the virus to others.
Distinguishing COVID-19 from Other Illnesses
With other respiratory illnesses like the flu and common cold circulating, it can be difficult to tell the difference. Health officials advise that symptoms like a high fever, severe fatigue, body aches, and a complete loss of taste or smell are often more indicative of COVID-19 than a common cold. With the new Nimbus and Stratus variants, a particularly severe sore throat or a hoarse voice can also be a key early indicator.
Staying Protected and Seeking Care
Health authorities continue to emphasize that vaccination, including updated booster shots, remains the best way to prevent severe illness, hospitalization, and death from all circulating variants. Other protective measures, such as practicing good hygiene, wearing a mask in crowded indoor spaces, and staying home when you're sick, are also recommended to help slow the spread.
Anyone experiencing new or worsening symptoms should get tested for COVID-19 to confirm a diagnosis and seek appropriate care. Emergency warning signs, such as trouble breathing, persistent chest pain, or new confusion, require immediate medical attention.
