(ORDO NEWS) — Scientists continue to research immunity from the coronavirus. It is important to establish how long antibodies remain in a person’s body after vaccination and after people become ill.
The obtained data are needed in order to understand when it is best to do a booster vaccine or revaccination.
It is also important to understand how long the herd immunity takes to know when humanity will finally defeat this dangerous disease.
According to the WHO, the number of infected people per day around the world is now the lowest in all three years of the disease’s existence, but complete victory is still far away.
A new study was conducted in Catalonia 6 months after the population was vaccinated against the coronavirus. It is worth noting that when scientists started work, Omicron had not yet appeared.
At the disposal of the scientists were medical records of people with notes about vaccines and whether the person was infected with the virus.
Vaccinated previously ill with coronavirus and those who did not, as well as non-vaccinated Catalans participated in the study. In total, 1067 people aged from 43 to 72 years were studied.
It turned out that 36% of people who were not vaccinated, but got sick with the coronavirus, stopped producing antibodies to the disease a year after infection.
People who got sick and then got vaccinated showed a slightly better result. In 2.1% of vaccinated people, antibodies were not detected at all. Breakthrough infections were found in 1%.
It was also established after which vaccines the antibodies remained in the body the longest. These were Moderna and Spikevax.
In people after 60 years, antibodies to the disease are produced very poorly. The factor of old age significantly affected the indicators. These people still remain in the risk group.
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