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# J&J Accumulating Data to Support Booster Vaccine
- URL: https://www.fdaweb.com/j-j-accumulating-data-to-support-booster-vaccine/
- Published: 2021-08-25T12:00:00.000Z
- Updated: 2026-09-14T17:11:47.000Z
- Author: David McFarland
- Tags: Drugs, #legacy-id-D5150014

Johnson & Johnson says it has generated data supporting the use of its Covid-19 vaccine as a booster shot for people previously vaccinated with its single-shot vaccine. Anticipating the need for booster shots this fall and winter, the company says it conducted two Phase 1/2a studies in individuals previously vaccinated with its single-shot vaccine.  

“New interim data from these studies demonstrate that a booster dose of the Johnson & Johnson Covid-19 vaccine generated a rapid and robust increase in spike-binding antibodies, nine-fold higher than 28 days after the primary single-dose vaccination,” the company says. “Significant increases in binding antibody responses were observed in participants between ages 18 and 55, and in those 65 years and older who received a lower booster dose.”  

Johnson & Johnson says it is engaging with FDA and other global regulators about the need for a booster shot eight months or longer after the primary single-dose vaccination.