LISBON, PORTUGAL - April 12: Neighbors on their windows looking down to a violinist who plays to cheer up the quarantine on April 12, 2020 in Lisbon, Portugal. <br /> The covid-19 pandemic has spread at breakneck speed, and quarantining more than 3.9 billion people, closed in their homes - more than half of the planet's population.<br /> Photo by Luis Boza/VIEWpress vía Getty Images
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