Recent reports of a sharp, “knife-like” sore throat (dubbed “刀片嗓” online) have sparked concerns about the COVID-19 KP.2 variant. As this Omicron subvariant spreads globally, here’s how to identify its symptoms, differentiate it from other illnesses, and protect yourself.
What Is the KP.2 Variant?
KP.2, a descendant of the JN.1 Omicron strain, is highly transmissible and has mutations that may help it evade immunity. While not yet proven to cause more severe illness, it’s driving a surge in cases in countries like the U.S., China, and India.
KP.2 Symptoms: Is Your Sore Throat a Red Flag?
Common KP.2 symptoms overlap with earlier Omicron strains but may include:
- Severe Sore Throat: Described as a sharp, burning pain (hence “刀片嗓”).
- Dry Cough and Congestion
- Fatigue and Muscle Aches
- Fever or Chills (less common than earlier variants)
- Loss of Taste/Smell (now rare).
Note: Sore throats are also linked to flu, strep throat, or allergies.
How to Tell If It’s KP.2, Flu, or a Cold
| Symptom | COVID KP.2 | Flu | Common Cold |
|---|---|---|---|
| Sore Throat | Severe, “knife-like” | Moderate | Mild |
| Fever | Sometimes | High & Sudden | Rare |
| Fatigue | Pronounced | Severe | Mild |
| Nasal Congestion | Common | Occasional | Very Common |
What to Do If You Suspect KP.2
- Test Immediately: Use a rapid antigen test or PCR. Repeat testing over 48 hours if negative but symptoms persist.
- Isolate: Stay home for 5 days or until fever-free for 24 hours.
- Manage Symptoms:
- Gargle with salt water for throat pain.
- Stay hydrated with warm fluids (tea, broth).
- Use OTC pain relievers (ibuprofen, acetaminophen).
- Seek Medical Help if you experience:
- Difficulty breathing.
- Persistent chest pain.
- Confusion or inability to stay awake.
Why Are Sore Throats More Common Now?
- Viral Evolution: KP.2 may better target upper respiratory tissues.
- Immunity Gaps: Waning vaccine protection or prior infection immunity.
- Seasonal Factors: Dry air and allergies can exacerbate throat irritation.
How to Protect Yourself
- Mask Up: N95/KN95 masks reduce inhalation of viral particles.
- Boost Immunity: Ensure COVID and flu vaccines are up-to-date.
- Ventilate Spaces: Open windows or use air purifiers indoors.
FAQ
Q: Can KP.2 cause long COVID?
A: Early data suggests long COVID risks are similar to other Omicron strains.
Q: Are throat lozenges effective?
A: They soothe pain but don’t treat the virus. Use medicated lozenges with antiseptic properties.
Q: How long is KP.2 contagious?
A: Most people remain infectious for 5–10 days after symptoms start.