Health experts are warning the national count of Covid-19 deaths in the United States could be underestimated as the coronavirus pandemic continues to spread. This could be especially true because the reporting data can lag by an average of one to two weeks, according to the latest guidance from the US Centers for Disease Control and Prevention's. Also, deaths due to Covid-19 "may be misclassified as pneumonia deaths in the absence of positive test results, and pneumonia may appear on death certificates as a comorbid condition," the CDC noted, adding that "analyses to better understand and quantify reporting delays" for...