Should parents be worried about vaccine effectiveness for 5- to 11-year-olds? An expert weighs in

To many parents' dismay, a new report from the US Centers for Disease Control and Prevention found that the Covid-19 vaccine is less effective against the Omicron variant for children ages 5 to 11 than for older children and adults. Two doses of the Pfizer/BioNTech vaccine reduced the risk of Omicron infection by 31% among children 5 to 11 years old, compared with 59% among those 12 to 15.