How to understand the difference between vaccination to prevent covid-19 and shots to halt infection. The purpose of the Covid-19 vaccines is to prevent death and serious health complications that strain our overburdened health care system. All the vaccines authorized for emergency use do this, and their safety and effectiveness in clinical trials have surpassed expectations. But most people, quite understandably, want to know something more: Will being vaccinated stop the spread of Covid-19 so they can socialize outside their bubbles and dine indoors with abandon? Eventually, yes. Many scientists are reluctant to say with certainty that the vaccines prevent transmission of the virus from one person to another. This can be misinterpreted as an admission that the vaccines do not work. That's not the case. The limited data available suggests the vaccines will at least partly reduce transmission, and the studies to determine this with more clarity are underway. There should be more data within the next couple of months. Until then, precautionary measures like masking and distancing in the presence of unvaccinated people will remain important. It is true that, according to the clinical trial data, both the Pfizer-BioNTech and Moderna vaccines are highly effective at preventing Covid-19,… Read full this story
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