Data from Israel — which has been vaccinating its elderly population in recent weeks — suggests that mass vaccination can stop the spread of severe COVID-19 symptoms, CNBC reports.

The study — published by the Centers for Disease Control and Prevention — is one of the first real-world data sets of how the vaccine is impacting the world. All of the vaccines were previously reviewed in clinical trials.

  • This is real-world data, showing how the vaccine is actually playing out in the world, according to The Los Angeles Times.
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According to the research, the percentage of patients who needed ventilation for severe COVID-19 dropped significantly after vaccinations in the country.

  • “Taken together, these results suggest reduced rates of severe COVID-19 following vaccination,” wrote the researchers, who work at Ben Gurion University of the Negev, Tel-Aviv University and Maccabi Healthcare Services, according to CNBC.
  • “What we see here are early and very encouraging signs that the vaccine is working in the population,” said Florian Krammer, a virologist at Icahn School of Medicine at Mount Sinai in New York City, according to
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A look at the numbers

Israel has been one of the leading countries for vaccinations, according to The New York Times. So far, about 84% of the country’s 70 and older population has been fully vaccinated through the Pfizer-BioNTech vaccine, according to CNBC.