by Marlowe HOOD PARIS, France (AFP) — Testing for COVID-19 and tracing the prior contacts of those found to be infected are crucial measures for slowing the disease’s spread, but inadequate unless combined with other measures, researchers said Wednesday. By itself, the test-and-trace approach can reduce the virus’ reproduction rate, or R number, by 26 percent, they reported in The Lancet Infectious Diseases, using mathematical models to examine data from previously published studies. The reproduction […]