Oluwaseun Falade-Nwulia, an assistant professor of medicine at Hopkins, said, We found a 70 % decrease in new [hepatitis B] attacks in the males who reported getting at least one dose of [hepatitis B] vaccine. However, vaccination rates, in high-risk individuals even, such as men who have sex with men, remain low, and we have to do a better work of encouraging vaccination, she stated in the news release. Adults obtaining the hepatitis B vaccine should receive 3 doses within half a year, the U.S.Modified gross margin as a share of modified net revenues within Actavis Pharma increased to 65.3 % in the first quarter of 2014 from 52.7 % in the first quarter of 2013, as a total result of the acquisition of Warner Chilcott in the fourth one fourth of 2013. Modified gross margin excludes outcomes from our divested EUROPEAN operations. Selling, General & Administrative expenditures within Actavis Pharma risen to $524 million in the 1st quarter of 2014 in comparison to $386 million in the 1st quarter of 2013, driven primarily by the acquisition of Warner Chilcott in the 4th quarter of 2013.