Updated On: 18 March, 2022 07:57 AM IST | Washington | AP
US officials have been laying the groundwork to deliver additional booster doses to shore up the vaccines` protection against serious disease and death from Covid-19

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Drugmaker Moderna asked the Food and Drug Administration on March 17 to authorize a fourth shot of its Covid-19 vaccine as a booster dose for all adults. The request is broader than rival pharmaceutical company Pfizer`s request earlier this week for the regulator to approve a booster shot for all seniors.
In a press release, the company said its request for approval for all adults was made `to provide flexibility` to the Centers for Disease Control and Prevention and medical providers to determine the `appropriate use` of a second booster dose of the mRNA vaccine, `including for those at higher risk of Covid-19 due to age or comorbidities." U.S. officials have been laying the groundwork to deliver additional booster doses to shore up the vaccines` protection against serious disease and death from Covid-19.