Vaccines using so-called mediator RNA (mRNA) technology will provide vaccinated people with protection against a serious form of covid disease for several years.
This is the conclusion reached in a new study by American scientists, which was published in a journal today Nature. The British researchers then found that another dose of the vaccine from AstraZeneca further strengthened the immune system’s response in already fully vaccinated people.
The mRNA technology is used by Pfizer / BioNTech and Moderna. MRNA vaccines differ from traditional ones in that they do not contain any dead or attenuated pathogens, but genetic information of the virus. This method is compared to a guide by which the body can make its own antibodies.Read also The drug, used for 20 years, also protects against covid, the Ostrava study showed
According to the researchers, it is likely that people vaccinated with Pfizer / BioNTech and Moderna will be protected from severe covide for several years. At the same time, protection is more permanent for people who have overcome covid and subsequently been vaccinated – it could be lifelong.
“This is a good sign of how resilient our immunity to this vaccine is,” he told The New York Times about the results of the study by immunologist Ali Ellebeda of Washington University in St. Louis. Louis, who led the study.Read also The first cases of covid could spread in China as early as October 2019
However, researchers are only considering existing coronavirus variants. However, according to experts, these are still increasing with the spread of the disease, and some of them could eventually prove resistant to the immunization provided by the current vaccines. If this were to happen, revaccination would probably be necessary.
Researchers at Oxford University said in a study published today that people who received a third dose of AstraZeneca in clinical trials had more antibodies than after the second dose. Researchers see this as a positive development, as it shows that in the event of declining protection, immunity can be strengthened again with another injection.Read also The delta variant will expand in Europe during the summer. It will account for 70% of new cases
However, it is not yet clear how long the protection will take after two doses of AstraZenec, scientists hope it will be at least a year or more.
Researchers have not yet concluded that the protection lasts after the Johnson & Johnson vaccine, which is approved in the USA and the EU, for example. However, according to immunologist Ellebedy, the response of the immune system is likely to be shorter than for vaccines with mRNA technology.
Source: Pravda.sk – Veda a technika by vat.pravda.sk.
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