Tests conclude the United States businessman did not have MERS after all , the World Health Organization says . He had met with second confirmed MERS patient in Illinois . ` Because there is still much we do n't know about this virus , we will continue to err on the side of caution when responding to and investigating cases of MERS in this country . '' 636 confirmed cases of MERS have been imported into the U.S. MERS is a coronavirus , the same group of viruses as the common cold .
Tests conclude the United States businessman did not have MERS after all , the World Health Organization says . He had met with second confirmed MERS patient in Illinois . 636 confirmed cases of MERS have been imported into the U.S. MERS is a coronavirus , the same group of viruses as the common cold .