Naturally-Acquired Immunity Offers Comparable Protection Against Delta, Israel Study Suggests
It is becoming increasingly rare to find mainstream media coverage of naturally acquired COVID immunity.
According to research shared in the medical journal medRxiv, people who were previously infected with COVID have comparable protection from the Delta variant when compared to those who were injected with the Pfizer vaccines.
The study, which was conducted by Israeli researchers in one of the world’s most immunized countries, has not yet been peer-reviewed.
According to Bloomberg, people who have recovered from a COVID-19 infection may be at a lesser risk of contracting the Delta form than individuals who have never been sick with coronavirus and have only received the two-dose Pfizer vaccination.
Meredith Wadman from Science magazine said on Friday, “The natural immune protection that develops after a SARS-CoV-2 infection offers considerably more of a shield against the Delta variant of the pandemic coronavirus than two doses of the Pfizer-BioNTech vaccine, according to a large Israeli study that some scientists wish came with a ‘Don’t try this at home’ label.”
According to the findings, people who received both doses of the Pfizer vaccine and had not previously contracted COVID were 13 times more likely to contract the highly transmissible Delta variant than those who had previously contracted COVID when the vaccination or infection occurred in January or February 2021, compared to those who had previously contracted COVID.
People who had not previously been infected were nearly six times more likely to get a breakthrough case of the Delta variant and over seven times more likely to have symptomatic illness than those who had previously been infected “at any time before vaccination (from March 2020 to February 2021), evidence of waning natural immunity was demonstrated”; however, people who had not previously been infected were nearly six times more likely to get a breakthrough case of the Delta variant and over seven times more likely to have symptomatic illness than those who had previously been infected.
The study mentioned analyzing previously infected people who had been given a single dose of a vaccine. “Notably, individuals who were previously infected with SARS-CoV-2 and given a single dose of the BNT162b2 vaccine gained additional protection against the Delta variant. The long-term protection provided by a third dose, recently administered in Israel, is still unknown.”
Researchers concluded with, “This study demonstrated that natural immunity confers longer-lasting and stronger protection against infection, symptomatic disease and hospitalization caused by the Delta variant of SARS-CoV-2, compared to the BNT162b2 two-dose vaccine-induced immunity. Individuals who were both previously infected with SARS-CoV-2 and given a single dose of the vaccine gained additional protection against the Delta variant.”
Scientists still urge people to get vaccinated instead of trying to get purposefully infected to develop natural immunity.
Michel Nussenzweig, an immunologist at Rockefeller University, issued a disclaimer, “What we don’t want people to say is: ‘All right, I should go out and get infected, I should have an infection party.’ Because somebody could die.”
Dr. Charlotte Thålin, an immunology researcher at Danderyd Hospital and the Karolinska Institute, responded to the study, “It’s a textbook example of how natural immunity is really better than vaccination. To my knowledge, it’s the first time [this] has really been shown in the context of COVID-19.”
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