Israel is struggling against a virulent second wave of COVID-19, the disease caused by the coronavirus, with thousands of new cases diagnosed every day. A key element in the fight to contain the pandemic is contact tracing. In Israel, this is conducted by the Internal Security Service, the Shin Bet, using methods originally designed for counterterrorism. Linda Gradstein reports from Jerusalem.Camera: Ricki Rosen Produced: Barry Unger 
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