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J.&J. Vaccine May Be Less Effective Against Delta, Study Suggests

Many who received the shot may need to consider boosters, the authors said. But federal health officials do not recommend second doses.

source https://www.google.com/url?rct=j&sa=t&url=https://www.nytimes.com/2021/07/20/health/coronavirus-johnson-vaccine-delta.html&ct=ga&cd=CAIyGjFkN2ExMDc2MDg4NTlkMzA6Y29tOmVuOlVT&usg=AFQjCNEq6N_PfZ6rThjpJxPLCafTiTABXg

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