03/29/2021 1:37 PM
Clarín.com
World
Updated 03/29/2021 1:55 PM
A study published in the United States states that, after the application of the second dose, the Pfizer / BioNTech and Moderna vaccines have
reduced COVID infections by 90%
among health personnel.
The findings are part of a study that the US Centers for Disease Control and Prevention (CDC) did on these vaccines
based on the science of messenger RNA
(called mRNA).
This technique consists of injecting strands of genetic instructions called messenger RNA into the body, which inform the cells what to do.
Thus, the messenger RNA of the vaccine is inserted into the body and takes control of this machinery to
manufacture a specific antigen:
the "spike" of the coronavirus, which allows it to adhere to human cells to penetrate them.
This spicule, harmless in itself, will be detected by the immune system that will produce antibodies, and these in turn will remain on guard for a long time.
Once the genetic material has been injected, "the cells at the injection site will begin to temporarily produce one of the virus proteins," explained Christophe D'Enfert, scientific director of the Institut Pasteur, to the agency. AFP.
The advantage is that, when using this method, there is no need to grow a pathogen in the laboratory, because it is the organism that does the job.
It is for
this reason that vaccines develop more quickly
.
No cells or chicken eggs (as with flu vaccines) are needed to make this vaccine.
The data confirm what was seen in controlled clinical trials conducted before both vaccines received emergency use authorizations from the US Food and Drug Administration.
This finding serves to allay fears that vaccinated people might carry asymptomatic infections and spread it to others.
This study
suggests that this is a highly unlikely possibility
.
Source: agencies
