Walgreens changed the dosing schedule of the Pfizer vaccine from three weeks apart to four weeks apart, prompting complaints from customers and bringing the attention of federal health officials. Walgreens had not publicly announced this dosing calendar tweak. The CDC has asked Walgreens to adhere to the three-week dosing guidelines. The company said its vaccine-scheduling system had a four-week default, which is the recommended time frame for the Moderna vaccine, which Walgreens is also administering. The company says it will now schedule people for Pfizer doses three weeks apart.
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