During Delta wave, vaccination and prior infection protected against COVID-19, but vaccination was safest, study finds

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COVID-19 cases charted across Canada COVID-19 cases charted across Canada

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Who will be the first to get COVID-19 vaccines? AP Illustration/Peter Hamlin Who will be the first to get COVID-19 vaccines? AP Illustration/Peter Hamlin

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This undated electron microscope image made available by the U.S. National Institutes of Health in February 2020 shows the Novel Coronavirus SARS-CoV-2, orange, emerging from the surface of cells, green, cultured in the lab. (NIAID-RML via AP) This undated electron microscope image made available by the U.S. National Institutes of Health in February 2020 shows the Novel Coronavirus SARS-CoV-2, orange, emerging from the surface of cells, green, cultured in the lab. (NIAID-RML via AP)

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Ukraine hopes to swap Mariupol steel mill fighters for Russian POWs

Ukrainian fighters extracted from the last bastion of resistance in Mariupol were taken to a former penal colony in enemy-controlled territory, and a top military official hoped they could be exchanged for Russian prisoners of war. But a Moscow lawmaker said they should be brought to 'justice.'

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