This article was published more than 2 years agoCommentGift ShareAs the United States marked another grim milestone Thursday with more than 4,000 covid-19 deaths reported in a single day, federal disease trackers said research suggests that people without symptoms transmit more than half of all cases of the novel coronavirus.The findings, which came from a model developed by the Centers for Disease Control and Prevention, demonstrate the importance of following the agency’s guidelines about wearing a mask and maintaining social distance, officials said. The emergence of a of the virus,...…This article was published more than 2 years agoCommentGift ShareAs the United States marked another grim milestone Thursday with more than 4,000 covid-19 deaths reported in a single day, federal disease trackers said research suggests that people without symptoms transmit more than half of all cases of the novel coronavirus.The findings, which came from a model developed by the Centers for Disease Control and Prevention, demonstrate the importance of following the agency’s guidelines about wearing a mask and maintaining social distance, officials said. The emergence of a of the virus,...WW…