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different, while omicron may be highly, highly transmissible, vaccinations, especially boosters, can protect you from serious illness. and in a setback, parents of two to five-year-olds, pfizer says two doses of the vaccine did not produce enough immunity, and now testing out three child-sized doses. a delay until the second quarter of next year. >> you want to really get the right dose in the right regimen for the children. so although you don't like there to be a delay, you want to get it right and that's what they're talking about. >> yokyung lah, cnn, los angele cases skyrocket across the u.k. and scott mclean joins us from london. another day, another record. what's the latest? >> reporter: hey, kim, yes, the surge of omicron across the u.k. that france shut its borders to british tourists and business