“And, again, we see with XBB the constant threat of the evolution or emergence of further subvariants that may have characteristics that have allowed the disease to transmit more easily or to reinfect individuals previously infected or protected by vaccination. So, it’s very important.”
“The more this virus circulates, the more opportunities it will have to change.”
“It is the most transmissible subvariant that has been detected yet.” – WHO official Maria Van Kerkhove