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WorldView: China blocks COVID investigators

China has blocked a World Health Organization team of experts conducting an investigation into the origin of the coronavirus from entering the country. In Hong Kong, police arrested at least 53 pro-democracy activists. And U.S. intelligence agencies have formally named Russia as the likely source of the massive cyber-hack revealed in December 2020. CBS News foreign correspondent Roxana Saberi joins CBSN AM from London with those stories.

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What to know about COVID vaccine trials

Many top scientists say a coronavirus vaccine could be ready before the end of the year, and President Trump has even said it could happen by Election Day. But it's a very challenging process CBS News' Natalie Brand reports on the latest developments, and Elaine Quijano of CBSN's "Red & Blue" discussed that deadline and how scientists conduct clinical trials with Dr. Wilbur Chen, associate professor of medicine at the University of Maryland, and chief of the Adult Clinical Studies Section within the Center for Vaccine Development and Global Health.

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