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Sweden releases early results of 'herd immunity' strategy
03:21 - Source: CNN
CNN  — 

After months of effort to limit the spread of the coronavirus in the United States, herd immunity has emerged as a controversial topic.

During a call with reporters on Monday, White House senior administration officials discussed a controversial declaration written by some scientists that advocates for ending lockdowns, building immunity and pushing for those who are not vulnerable to Covid-19 to resume normal life. </