Pfizer Says COVID-19 Vaccine Efficacy Weakens Over Time

Pfizer said that data from Israel and the United States suggests that its COVID-19 vaccine efficacy drops over time and claimed that booster doses are effective at dealing with new virus variants.

Federal health officials two weeks ago announced a target date of Sept. 20 to try and roll out booster shots for the general public, although a recent studyfrom several top scientists at the World Health Organization and Food and Drug Administration (FDA) found that the general population doesn’t need a booster dose.