US health regulators delayed the review of Pfizer Inc's COVID-19 vaccine for children under 5 years of age because its two-dose regimen did not work well against the Omicron variant, the Wall Street Journal reported on Friday.

Low Omicron efficacy behind delay of Pfizer COVID vaccine for kids under 5: WSJ

low-omicron-efficacy

Low Omicron Efficacy, News on Low Omicron Efficacy, stories on Low Omicron Efficacy, articles on Low Omicron Efficacy, Low Omicron Efficacy stories at Wion, Low Omicron Efficacy news, Low Omicron Efficacy latest news

low omicron-efficacy

Low Omicron efficacy behind delay of Pfizer COVID vaccine for kids under 5: WSJ