COVID KP.3 variant: Symptoms, spread, infections, latest data from CDC
A new COVID-19 variant, KP.3, is making waves globally—and fast. It’s now the most common strain in the U.S., causing concern among health experts due to its rapid spread and ability to dodge some existing immunity.
What’s Happening?
As of July 2024, KP.3 has taken the lead in the U.S., making up about 33% of all COVID-19 cases, overtaking older variants like KP.2 and JN.1. It’s also driving a noticeable summer surge in infections—a pattern not usually seen outside winter months.
This variant is spreading rapidly across the United States, Japan, South Korea, India, and Southeast Asia.
What is KP.3?
KP.3 is a spin-off of the Omicron JN.1 strain. It belongs to a group of variants nicknamed “FLiRT” (named after specific mutations in the virus). These mutations help KP.3:
- Spread faster
- Partially escape immunity from past infections or vaccinations
Why Are Experts Worried?
Here’s why KP.3 is on the WHO’s radar:
- Faster Spread – It transmits about 1.2 to 1.5 times faster than previous Omicron variants.
- Immune Escape – It’s better at sneaking past your body’s defenses.
- Off-Season Surge – Unlike older strains that peaked in colder months, KP.3 is spreading during the summer.
Where Is KP.3 Spreading?
Here’s a quick look at the global situation:
| Region | Trend |
| U.S. | 33% of current cases; hospitalizations up 12% in some states |
| Japan | Cases in Tokyo doubling weekly |
| South Korea | KP.3 now dominant; mask mandates being reconsidered |
| India | States like Maharashtra and Kerala report rising hospital cases |
| UK & Europe | Slower spread; KP.2 still more common |
Symptoms to Watch For
KP.3 symptoms are similar to Omicron, but with a few changes:
- More intense fatigue and sore throat
- Less loss of taste or smell
- Common symptoms: fever, cough, congestion
- Some people report nausea or diarrhea
Are Vaccines Still Working?
Yes—updated boosters from 2023–2024 (based on XBB.1.5) still offer good protection against serious illness
Antiviral treatments like Paxlovid still work well
WHO is tracking how well current vaccines hold up, and new boosters targeting KP.3 may be released by late 2024
How Are Health Authorities Responding?
- WHO has labeled KP.3 a “Variant of Interest” and is urging countries to increase monitoring and update vaccines
- CDC recommends high-risk groups get boosted now
- Countries like Japan and South Korea are bringing back mask recommendations in public areas
Should You Be Worried?
Here’s a quick breakdown:
- Healthy individuals: Most cases remain mild
- Older adults or high-risk people: It’s smart to mask up in crowds and get boosted
- No lockdowns for now, but local restrictions could return if hospital cases surge
The Bottom Line
KP.3 is spreading fast but isn’t as dangerous as earlier COVID waves. Vaccines and prior immunity are still helpful, and treatments remain effective. However, if you’re at high risk, stay cautious—this new variant thrives even in summer.
Stay informed by following trusted health authorities like WHO, CDC, and local health departments.
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