Science

Moderna vaccine more effective than Pfizer, New Harvard study says

10:14, 06 December 2021
Moderna vaccine more effective than Pfizer, New Harvard study says Photo: pixabay.com

The researchers from the T.H Chan School of Public Health, Harvard Medical School, Massachusetts Veterans Epidemiology Research and Information Center, Harvard Medical School along with the Department of Biostatistics made a comparison between two vaccines of Pfizer and Moderna and found out that the latter is more efficient against COVID-19.


Their study was published in The New England Journal of Medicine on December 1 and said that both vaccines have a greater effect against the symptomatic virus with a minor difference in protection against it.

The conducted research was based on health documents of roughly 444.000 US Veterans when one half was given a Moderna jab, and another was inoculated with Pfizer respectively in a period from January 4 and May 21 of the current year, according to Harvard Magazine. All the Veterans were above 18 and hadn’t ever been contracted with the virus before they were given a shot.

It showed that those who were inoculated with Pfizer had an increased risk of becoming ill from COVID-19 following the next 24-week span after the first dose and a 70 percent higher possibility of getting hospitalized during the Alpha variant ravaging times. 

The researchers have no answer why both of these vaccines differ, however they have theories on this. They said the theory is based on the fact that the vaccines contain different messenger RNA (mRNA), on a period between jabs and the “lipid composition of the nanoparticles which are being used in mRNA packaging, according to the research.

The Pfizer and Moderna vaccines use lab-created mRNA which helps the researchers to find out how to produce a protein that would trigger the immune response in the body, so the Moderna vaccine has as many as three times more micrograms of the mRNA content than the Pfizer does.