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“XBB is a hybrid version of two strains of the BA.2 form of Omicron,” explains Amesh A. Adalja, M.D., a senior scholar at the Johns Hopkins Center for Health Security. 

It’s currently “spreading efficiently in Singapore,” he adds.

The variant was first detected in August 2022 in India, and has been detected in more than 17 countries since then, including Australia, Bangladesh, Denmark, India, Japan and the U.S., per Singapore’s Ministry of Health.

XBB variant symptoms
Fever or chills

· Cough

· Headache

· Congestion or runny nose

· Sore throat

· Shortness of breath or difficulty breathing

· Fatigue

· Muscle or body aches

· New loss of taste or smell

· Nausea or vomiting

· Diarrhea


https://www.prevention.com/health/a41648...-immunity/

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Bump.