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By Donna Lu Squiggly pencil lines on paper make inexpensive electrodes that can sense heart rate or skin temperatureYadong Xu Pencil sketches on paper can be used as sensors that detect a variety of physiological signals, including heart rate, skin temperature and compounds in sweat. Zheng Yan at the University of Missouri and his colleagues…

The United States marked a subdued Fourth of July holiday with social distancing and restrictions on crowds preventing the typical gatherings and firework displays amid a surge in coronavirus infections in southern and western states.  Racial justice protests were also planned in the US capital on Saturday, where President Donald Trump is set to deliver…

The global coronavirus pandemic has infected more than 11.1 million people and claimed over 528,000 lives. Here are updates for July 4: People, social distancing and wearing masks, wait in line at a mask distribution event, Friday, June 26, 2020, in Miami, US. (AP) Saturday, July 4WHO reports record single-day rise in casesThe World Health…

PITTSBURGH — Health officials in Allegheny County report one of the largest daily increases in coronavirus cases in weeks, with 61 new cases confirmed on Friday. There were 61 new positive cases of COVID-19 on Friday. You can now customize your WPXI News App to receive breaking news alerts. CLICK HERE to find out how.…