FILE - In this Wednesday, Jan. 29, 2020 file photo, Maria van Kerkhove, head of the Outbreak Investigation Task Force for the World Health Organization speaks during a news conference at the European headquarters of the United Nations in Geneva, Switzerland. The World Health Organization on Monday Dec. 7, 2020 had an unwelcome but potentially life-saving message for the holiday season: Don't hug. Maria Van Kerkhove, WHO’s technical lead on COVID-19, said most transmission happens among people who tend to spend a lot of time together sharing meals and indoor spaces, in workplaces or homes. (Martial Trezzini/Keystone via AP, File)
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