Aug 25, 2021 - Health

J&J says its COVID booster significantly increases antibodies

Vials and syringes of the Johnson and Johnson Janssen Covid-19 vaccine are displayed

Vials and syringes of the Johnson & Johnson Janssen COVID-19 vaccine are displayed. Photo: Patrick T. Fallon/AFP via Getty Images

A booster shot of the Johnson & Johnson coronavirus vaccine offers a significant increase in antibodies, the company announced Wednesday.

Driving the news: People who received a booster shot six to eight months after their first J&J dose saw "a rapid and robust increase in spike-binding antibodies, nine-fold higher than 28 days after the primary single-dose vaccination," J&J said.

  • The data comes from two Phase 2 studies in individuals previously vaccinated with the single-shot vaccine.
  • "We have established that a single shot of our COVID-19 vaccine generates strong and robust immune responses that are durable and persistent through eight months," Mathai Mammen, global head of research and development for Janssen, said in a statement.
  • "With these new data, we also see that a booster dose of the Johnson & Johnson COVID-19 vaccine further increases antibody responses among study participants who had previously received our vaccine."

The big picture: The announcement comes a week after the federal government announced that beginning the week of Sept. 20, those who received a Pfizer or Moderna vaccine should expect to be offered a booster shot eight months after their second dose.

  • The J&J vaccine was not part of the Biden administration's initial booster plan due to a lack of data, per the New York Times.
  • Johnson & Johnson says it will submit the data to the Food and Drug Administration, and it looks "forward to discussing with public health officials a potential strategy for our Johnson & Johnson COVID-19 vaccine."

Go deeper: What to know if you got the J&J vaccine

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