Walgreens Boots Alliance Inc said on Friday that COVID-19 booster shots from Moderna and Johnson & Johnson have begun to be administered in its U.S. stores, a day after the country's health regulator recommended the additional dosages.

The Centers for Disease Control and Prevention (CDC) said on Thursday that Americans can get a booster shot that is different from their original immunization.

For 18-year-olds and older who received the first injection at least two months ago, US health regulators have advised a second dosage of J&J's single-dose COVID-19 vaccine.

They also suggested that those over 65 and those at high risk of severe sickness and exposure to the virus through their work have a third dosage of Moderna's two-dose vaccination six months after the second treatment.Walgreens is prepared to transform to meet the needs of the modern customer  | MobiHealthNews

The FDA and CDC approved COVID-19 booster doses from Pfizer and partner BioNTech for the same groups as Moderna last month.

On September 24, U.S. pharmacy chains such as Walgreens, Rite Aid, and CVS began administering Pfizer/BioNTech booster dosages at their locations.

Since Aug. 13, when immunocompromised Americans began receiving additional doses of Pfizer/BioNTech and Moderna vaccinations, about 11.6 million patients have received additional doses.