This line is the whole point of the article.
"In the case of a full-blown infection, scientists found that the body had fewer antibodies against that critical piece. It’s like giving someone a study guide of the most important class material versus telling them to reread everything from the whole year for the final exam."
Source is here: https://pubmed.ncbi.nlm.nih.gov/34103407/
Anyone have more details? I don't seem to find the actual numbers in that source.
I think the link you give is to the Abstract only. In the top right, you can click on the source for the article, in Science Translational Medicine, and the pdf is there. A bit too technical for me. But I googled the first author and this CNN report seems to be based on that research.
7:38 p.m. ET, June 17, 2021
Researchers present more evidence coronavirus vaccines protect against variants
From CNN’s Maggie Fox
There’s more evidence that at least some of the current coronavirus vaccines protect people against the ever-changing variants of coronavirus.
Tests done using the blood of both people who had recovered from Covid-19 and those who had been vaccinated with Moderna’s vaccine showed big differences in how the immune system responded to mutations in the virus, Dr. Allison Greaney of the Fred Hutchinson Cancer Research Center and the University of Washington told a meeting of federal vaccine advisers.
“We know that the SARS-CoV-2 virus is evolving to evade antibody immunity,” Greaney told a meeting of the National Vaccine Advisory Committee, which advises the US Health and Human Services Department.
“What we found for the Moderna-1273 mRNA vaccine was that, overall, that antibody immunity elicited by this vaccine to be less affected by single mutations,” Greaney said.
The team, which is tracking viral mutations and their effects, made artificial versions of mutant virus and tested them against samples of blood. While some mutations caused a 30-fold loss of antibody effectiveness against the virus in the blood of people who had recovered from an infection, the loss of efficacy was far lower in the blood of people given two doses of Moderna vaccine, she said.
In some samples, there was no effect on the immunity – which suggested that the vaccine stimulates a broad immune response that covers the current mutations, she said.
“This suggests that the vaccine-elicited antibodies are much more broad and are less affected by single mutations,” Greaney told the meeting.
Federal officials have been urging Americans to get vaccinated quickly to stop the virus from circulating and acquiring the mutations that help it evade the immune system. Tests such as those done at the University of Washington lab support the idea that people who have been infected will be more vulnerable to catching variant versions of the virus than vaccinated people will be.
https://www.cnn.com/us/live-news/coronavirus-pandemic-vaccine-updates-06-17-21/index.html