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In light of the spread of the mutated “Delta” of the Corona virus in several countries, a study by the Mayo Clinic found that the Moderna vaccine is more effective than Pfizer, in the face of the new variant.
The study, published by MedRxiv, confirmed that the efficacy of both vaccines, which was 90% in January, declined after the appearance of the delta mutant. However, one was still more effective than the other, with Moderna dropping to 76% and Pfizer to 42%, according to study results of more than 50,000 patients.
The study found that in several US states, people vaccinated with Pfizer were twice as likely to develop delta infections compared to Moderna, without explaining why.
However, both vaccines still appear to be very effective (over 90%) at preventing severe symptoms.
Moderna and Pfizer have both used messenger RNA (mRNA) technology to make their vaccines against the emerging corona virus.
Messenger RNA is a molecule that transmits the genetic code from DNA to the cell to produce proteins.
Conventional vaccines are based on the principle of inactivated viruses, and these vaccines train the body to recognize antibodies, which are proteins produced by the virus, which would activate the immune system’s response when confronted with the virus, according to the AFP.
Messenger RNA vaccines transmit genetic instructions for the production of these antibodies directly into cells, and the human body becomes the site for vaccine production.
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