All hemorrhagic fever viruses have single-stranded RNA genomes, which differ in polarity and in the number of segments (flaviviruses: positive-sense, 1 segment; filoviruses: negative-sense, 1 segment; arenaviruses: negative-sense, 2 segments; bunyaviruses: negative-sense, 3 segments).or example, many cases of Crimean-Congo hemorrhagic fever, Lassa or yellow fever are mild and go unrecognized, but Ebola and Marburg hemorrhagic fever is almost always a severe disease, in which the case fatality rate ranges from 50-90%.
You'll pay the standard premium amount if: 1  You enroll in Part B for the first time in 2017. 2  You don't get Social Security benefits. 3  You're directly billed for your Part B premiums.  You have Medicare and Medicaid, and Medicaid pays your premiums. (Your state will pay the standard premium amount of $134.)
How Are Medicare Part B Premiums Determined? The formula for the calculation of the standard premium was developed in 1965, when Medicare first went into effect. At this time, the monthly premium for Part B was only $3.00. The current rate is determined each year, depending on the level of costs for Medicare expenses in the previous year. The official formula for determining Part B premiums was established by Congress decades ago.