Moderna vaccine: Study highlights vaccines efficacy with no booster shots required


Booster shot doses are being debated globally to determine whether a stronger immunity and a potential stop to the COVID-19 spread is feasible. Concerns circulate regarding even a small reduction in efficacy against the spread of Covid and how this could strain the health care system particularly with Winter approaching.

Researchers compared recovered COVID-19 patients to vaccine trial participants who received a 25 microgram (mg) dose of the Moderna vaccine during the phase one clinical trials (supported by the National Institute of Allergy and Infectious Diseases, National Institutes of Health).

The study found that a low dose of the Moderna vaccine lasts for at least six months with no indicator that vaccinated people will need a booster shot.

“This time point is critical because that is when true immune memory has formed,” said LJI Research Assistant Professor Daniela Weiskopf, Ph.D., who co-led the study with LJI Professors Alessandro Sette and Shane Crotty.

“The immune memory was stable, and that was impressive,” added Dr Crotty.

“That’s a good indicator of the durability of mRNA vaccines.”

A U.K. government advisory panel is set to soon recommend whether to move forward with broad use of a third vaccine dose.

The UK is already offering boosters to those with severely weakened immune systems, as are many European Union countries.

The European Medicines Agency is also reviewing booster data from Pfizer and BioNTech, and from Moderna Inc.



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