After promising data, experts say many questions remain over an experimental Alzheimer's drug

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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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Auger-Aliassime, Shapovalov give Canada 1st Davis Cup title

Canada won its first Davis Cup title on Sunday, beating Australia behind victories from Denis Shapovalov and Felix Auger-Aliassime. Montreal's Auger-Aliassime beat Australia's Alex de Minaur 6-4, 6-3 on Sunday to clinch Canada's first Davis Cup championship. Shapovalov, from Richmond Hill, Ont., won Canada's first singles match -- 6-2, 6-4 over Thanasi Kokkinakis -- on Sunday.

Pockets of shelling across Ukraine as wintry warfare looms

Russian forces struck eastern and southern Ukraine early Sunday as utility crews scrambled to restore power, water and heating with the onset of snow and frigid temperatures, while civilians continued to leave the southern city of Kherson because of the devastation wreaked by recent attacks and their fears of more ahead.

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