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. 2019 Jan 25;7:20734–20747. doi: 10.1109/ACCESS.2019.2895075

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FIGURE 2. — The actual contact time where the two smartphones are collocated within the disease transmissible critical distance can be relatively very small compared to , the entire time span of checked length in the magnetometer traces.

Inline graphic — The actual contact time where the two smartphones are collocated within the disease transmissible critical distance can be relatively very small compared to , the entire time span of checked length in the magnetometer traces.