Amagerageza yawo ku barwayi mu bice bitandukanye by'isi yari yakomwe mu nkokora n'ubushakashatsi bwasohotse mu kinyamakuru The Lancet cy'ubushakashatsi mu buvuzi, bwavuze ko wongereye umubare w'impfu ndetse ugateza ibibazo by'umutima ku barwayi bamwe.
