, which means people get infected faster and so it’s harder to track cases before more infections occur. “The vaccine is not a bug zapper,” explains Amesh Adalja, a physician and senior scholar at the John Hopkins Center for Health Security. What he means is that at first the virus isn’t completely neutralized like a squashed bug.
The Pfizer/BioNTech vaccine is 88% effective against Delta after two shots versus 93.7% against original Covid-19 after two shots, according to a lab study. What this means is that, the country will experience 88% fewer Delta cases compared to the likely outcome if no one got vaccinated. This does not mean that 88 out of 100 people would be protected from Delta. But after only one shot, the vaccine is not very effective at protecting against the Delta variant.
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