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Israeli Study Compares Vaccinated -Vs- Natural Immunity: Which Protects You Better From Delta?

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Science Magazine reported: 

The new analysis relies on the database of Maccabi Healthcare Services, which enrolls about 2.5 million Israelis. The study, led by Tal Patalon and Sivan Gazit at KSM, the system’s research and innovation arm, found in two analyses that people who were vaccinated in January and February were, in June, July, and the first half of August, six to 13 times more likely to get infected than unvaccinated people who were previously infected with the coronavirus. In one analysis, comparing more than 32,000 people in the health system, the risk of developing symptomatic COVID-19 was 27 times higher among the vaccinated, and the risk of hospitalization eight times higher.

Source: Bloomberg

At the very least, the results of the study are good news for patients who have already successfully battled COVID but show the challenge of relying exclusively on immunizations to move past the pandemic.

“This analysis demonstrated that natural immunity affords longer lasting and stronger protection against infection, symptomatic disease and hospitalization due to the delta variant,” the researchers said.

Unfortunately, the study also showed that any protection is time-limited. Protection offered by natural infection wanes over time, just like the protection afforded by vaccines: The risk of a vaccine-breakthrough delta case was 13x higher than the risk of developing a second infection when the original illness occurred during January or February 2021. That’s significantly more than the risk for people who were ill earlier in the outbreak.

What’s more, giving a single shot of the vaccine to those who had been previously infected also appeared to boost their protection. Still, the data don’t tell us anything about the long-term benefits of booster doses.

Read Entire Study: LINK

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