Researchers person analyzed antibody levels 15 days aft the booster shot. (File)
People who received Johnson & Johnson's Covid-19 vaccine whitethorn payment from a booster dose of Pfizer oregon Moderna, preliminary results of a US survey published Wednesday showed.
The study, funded by the National Institutes of Health (NIH), was eagerly awaited successful the United States due to the fact that it looked astatine the anticipation of "mixing" vaccines -- utilizing a antithetic vaccine than the archetypal doses for the booster changeable -- which is not presently allowed successful the country.
The survey was conducted connected 458 adults who had been vaccinated with 1 of 3 US-approved brands (Pfizer, Moderna oregon J&J) for astatine slightest 12 weeks.
These 3 groups were each divided into 3 caller groups to person 1 of the disposable vaccines arsenic a booster. The 9 groups consisted of astir 50 radical each.
Researchers past analyzed antibody levels 15 days aft the booster shot.
For radical primitively inoculated with J&J, antibody levels were 4 times higher aft a J&J booster, 35 times higher aft a Pfizer booster and 76 times higher aft a Moderna booster.
And antibody levels for those who had primitively received Moderna shots were higher "irrespective of the booster vaccine administered," erstwhile compared with those who had initially received Pfizer oregon J&J, the survey said.
Additionally, "no information concerns were identified" aft booster doses were administered, it found.
The study, which has not yet been peer-reviewed, has respective limitations, however.
The fig of participants was small, and the immune effect could germinate implicit time, beyond the 15 days observed during the study.
"Important not to get excessively carried distant with the findings," tweeted Peter Hotez, a prof astatine Baylor College of Medicine.
Results from trials connected a 2nd J&J booster changeable conducted by the institution itself were "impressive," helium said.
The NIH survey should substance discussions by a US Food and Drug Administration (FDA) adept committee, which is scheduled to see applications for a booster dose from Moderna and J&J connected Thursday and Friday, respectively.
A booster from Pfizer has already been approved successful the United States for definite populations, specified arsenic radical aged 65 oregon older, adults with high-risk aesculapian conditions and those successful jobs wherever they are often exposed to the coronavirus.
(Except for the headline, this communicative has not been edited by NDTV unit and is published from a syndicated feed.)