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www.nytimes.com Why Vaccinated People Are Getting ‘Breakthrough’ Infections

The vaccines are effective, but they are not a golden shield against the coronavirus, particularly not the Delta variant.
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www.cnn.com How worried should vaccinated people be of Covid-19 breakthrough infections?www.cnn.com

www.forbes.com Among Fully Vaccinated, Breakthrough Covid-19 Infections Are More Common Than Previously Thought: Does It Matter?www.forbes.com