Pfizer says pandemic could extend to 2024, vaccine data for younger children delayed

Early data suggests that three doses of the shot may be necessary to protect against the Omicron variant.

Pfizer Inc on Friday forecast that the COVID-19 pandemic would not be behind us until 2024 and said a lower-dose version of its vaccine for 2- to 4-year-olds generated a weaker immune response than expected, potentially delaying authorization.