The FDA then revoked the vaccine’s EUA in June after the manufacturer requested its voluntary withdrawal.
The company enrolled participants for its late-stage in September 2020 and tested its vaccine with two different doses.
How It Works
Johnson & Johnson’s vaccine is a single-dose adenovirus-based vaccine.

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Recombinant vaccines use a small piece of genetic material from the virus to trigger an immune response.
This genetic material for COVID-19 does not replicate in the body.
There can be some drawbacks to recombinant vaccines.
One example is that booster shots may be required over time.
Examples of recombinant vaccines arepneumococcal vaccinesandvaccines for meningococcal disease.
How Effective Is It?
This effectiveness in the Phase 3 trial was reached 28 days after vaccination.
Regulators determined that the event was not related to the vaccine and the trial was safe to resume.
The efficacy against moderate to severe COVID-19 infection varied by region in the trial.
There is currently limited data available showing how effective the vaccine is at protecting against the Omicron variant.
When Was it Made Available?
The FDA revoked the EUA on June 1, 2023.
Who Can Get the Johnson & Johnson Vaccine?
The Johnson & Johnson vaccine was available for individuals 18 and over.
Most people who develop this disorder recover completely.
The onset of symptoms occurs approximately one to two weeks after administration of the Johnson & Johnson COVID-19 vaccine.
For the most recent updates on COVID-19, visit ourcoronavirus news page.
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