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herd immunity
World
New York celebrates relaxation of coronavirus restrictions with fireworks
World
Spain is on track for herd immunity, PM says
World
Europe will reach herd immunity by August – BioNTech chief
World
Island in middle of Atlantic close to Covid herd immunity, doctor says
World
First Americans could get Covid-19 vaccine by early December
World
Covid-19 antibodies wane within three months, Oxford study suggests
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World
Herd immunity call backed by British academics
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