If you got sick with original strain of COVID-19, you are less likely to get an infection from the subvariant of omicron BA.5according to a study published by the News Medical Life Sciences.
“Pre-exposure to SARS-CoV-2 virus reduced the risk of reinfection by BA.5 and the protective efficacy of the initial infection with Wuhan-Hu-1, Alpha, Delta and BA.1/BA.2 it was 52.9 percent, 54.9 percent, 62.3 percent, and 80 percent, respectively,” the study noted.
However, one previous infection with subvariants BA.1 or BA.2 it may have a maximum protective effect (of 80 percent) against reinfection with BA.5, this in a population with a complete vaccination schedule, detailed the study researchers.
The study uses data from the national COVID-19 registry in Portugal to calculate the risk of infection by the BA.5 subvariant in people who have not been sick with SARS-CoV-2 before, as well as in people who have already been sick with some strain, according to data updated to June 1, 2022.
Infections with BA.1 and BA.2 generated a significant immunity for a longer period of time, three to five months.
Specialists considered that the findings change the perception that infection by subvariants BA.1 and BA.2 does not protect against BA.5, since the data indicate that there is protection.
This study, however, is under peer review, that is, it is a preliminary report that is being analyzed by specialists in the area and its result is not conclusive.
Contagions with omicron and variant BA.5
People who were infected with omicron may have a better immune response to subvariants BA.4 and BA.5, according to specialists.
A study that conducted observations on the population infected with COVID in Qatar between May 7 and July 4 found that people less susceptible to contracting SARS-CoV-2 They are the ones that were infected in previous months by the omicron variant, which was seen for the first time in November 2021 and was responsible for millions of infections that occurred at the beginning of the year.
The above does not mean that if you got COVID from the first variants (Alpha, Beta and Delta) have no immune response to a new infection with symptoms by subvariants BA.4 and BA.5; however, those who tested positive for omicron showed greater defense.
This study was published on the MedRxiv server and published in the scientific journal Nature. You can read it in full at this link.