Covid shots prevent more than 99% of hospitalizations, study suggests

Covid vaccines are virtually 100 percent effective at protecting people from getting sick enough from the virus to need to be hospitalized, new, real-world data reveal.  

A medical research center in Cleveland, Ohio studied coronavirus vaccine effectiveness among its staff and found resounding success.

Of about 2,000 caregivers in the study who tested positive for COVID, only 0.3% – or about six people – were fully vaccinated. That translates to near-100 percent effectiveness against hospitalization. 

Meanwhile, 99.75 percent of COVID patients admitted to the center’s hospitals during the study period were not fully vaccinated.

On the national scale, hospital admissions have dropped a dramatic 12 percent in the past week alone – and 75 percent from the January peak – as the share of Americans who are fully vaccinated has risen to 45 percent of adults. 

But the new study, soon to be submitted for publication, shows not only that hospitalizations generally have decreased as vaccinations have increased, but that individuals who are fully vaccinated are 99 percent less likely to be hospitalized for the virus.  

It demonstrates that the Pfizer and Moderna vaccines live up to their promise: protecting people from getting severely ill from COVID-19. 

The Pfizer and Moderna vaccines proved to be about 97% effective at protecting workers in Cleveland, Ohio medical centers 

The U.S. is currently administering about 2 million vaccinations a day, down from 3 million in mid-April

The U.S. is currently administering about 2 million vaccinations a day, down from 3 million in mid-April

Both mRNA coronavirus vaccines performed impressively in their clinical trials. The Pfizer-BioNTech and Moderna vaccines demonstrated efficacy rates over 90 percent, blowing far past the FDA’s 50 percent benchmark for emergency authorization.

But now, as the vaccines have been publicly available in the U.S. and other countries for several months, we can examine how well they work in the real world among millions rather than tens of thousands of people. 

Real-world ‘effectiveness’ is often lower than clinical trial ‘efficacy’ because laboratory trials don’t account for factors that may make vaccines less successful. Trials often don’t include patients with certain underlying health issues, for example. Still, Pfizer and Moderna have remained impressive in the real world.

The latest demonstration of how well these vaccines work comes from Cleveland Clinic, a nonprofit medical research center in Cleveland, Ohio that runs several hospitals and family health centers.

Cleveland Clinic surveyed its staff and found that only 0.3% of those who tested positive for COVID were vaccinated

Cleveland Clinic surveyed its staff and found that only 0.3% of those who tested positive for COVID were vaccinated

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