The Johnson & Johnson vaccine efficacy is good for a one-shot vaccine. Johnson & Johnson (J&J) is a single-dose vaccine that can help prevent COVID-19.
It’s the third COVID-19 vaccine authorized by the Food and Drug Administration (FDA) for emergency use in the United States.
Large-scale clinical trials in several locations across the globe found that a single dose of the J&J vaccine was effective at preventing COVID-19. They found that the vaccine can also protect against several viral variants.
How effective is the Johnson & Johnson vaccine?
The efficacy of the J&J vaccine was tested in a clinical trial involving more than 40,000 people. The FDA reviewed this data, along with manufacturing information provided by Johnson & Johnson, when deciding to grant emergency use authorization.
In most people, COVID-19 is a mild or moderate illness. Many individuals can recover from mild to moderate COVID-19 at home.
J&J vaccine’s efficacy for mild to moderate COVID-19 14 days after vaccination was 66.3 percent. J&J vaccine efficacy for severe to critical COVID-19 14 days after vaccination was 76.3 percent. Additionally, individuals receiving the J&J vaccine were less likely to be hospitalized than those who didn’t receive the vaccine. In fact, the J&J vaccine was 93 percent effective at preventing hospitalization for COVID-19 14 days after vaccination and 100 percent effective 28 days after.
How long will the Johnson & Johnson vaccine protect you?
How long the J&J and Moderna vaccines will protect against COVID-19 is currently unknown. Research suggests that the Pfizer vaccine will offer protection for 6 months, but studies are ongoing.
Earlier clinical trials of the J&J vaccine found that a single dose of the vaccine produced a strong immune response in most people. Measurements taken 71 days later found that levels of antibodies remained stable or had increased.
Overall, more research is needed to determine how long the J&J vaccine will protect against COVID-19. It’s possible, but not certain, that a booster may be needed in the future.
How effective is the Johnson & Johnson vaccine against COVID-19 variants?
It’s completely normal for viruses to mutate. When this occurs, new variants can emerge.
So far, several different variants of the novel coronavirus have been identified. Some of these have caused concern amongst public health officials. This is because the variants may be more contagious or escape the immune response.
The J&J vaccine clinical trial can give us some indication of how effective the vaccine is against these variants. This is because the trial was carried out at a time when viral variants were very common in some locations.
What we know now
Clinical trials found that the J&J vaccine can prevent many types of COVID-19. Its overall efficacy was 66.3 percent for mild to moderate COVID-19 and 76.3 percent for severe to critical COVID-19. Additionally, it provides 100 percent protection from hospitalization for COVID-19 28 days after vaccination.
The J&J vaccine can also protect against asymptomatic COVID-19, as well as some viral variants. It’s currently unknown how long the vaccine protection will last. A booster shot may be needed in the future.
The efficacy of the three authorized COVID-19 vaccines can’t be compared directly, as the trials took place at different locations and at different times in the pandemic. Currently, no one vaccine is recommended over the others.
Author: Gesture Chidhanguro