October 1, 2023

The Catholic Transcript

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A new secondary variant can quickly re-infect even those already protected from Covid

Covid-19 variant. Photo: reproduction

According to health experts from the United States and other countries, the new variant of the coronavirus, Omicron BA.5, can re-infect even those who already have protection against the virus.

“What we are seeing is an increasing number of people who have had BA.2 and then become infected again four weeks later,” said Andrew Robertson, director of health for Western Australia. “So maybe six to eight weeks, they get a second infection, and that’s almost certainly BA.4 or BA.5.”

The explanation for this is as follows: when attacked, the immune system produces antibodies to fight the invader and protect the organism, but this protection decreases over time, and then, when a person is exposed to a disruptive agent in this period, the virus can. I’m looking for an opportunity.

A recent study by Columbia University, in the US, found that the recent BA.4 and BA.5 subvariants were at least four times resistant to protection from the virus compared to earlier variants of the omicron strain, the business says. season.

However, David Doody, an epidemiologist at the Johns Hopkins Bloomberg School of Public Health, notes that re-infection with BA.5 and BA.4 is usually less severe compared to early Covid-19 infection. He explained that as the virus evolves to have some antibody resistance, our immune system learns how to respond to it without letting the body spoil.

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