From Autoblog: Official: Mercedes-Benz debuts Beltbag airbag for rear seatbelts

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Mercedes-Benz can be credited with more technological firsts in the automotive industry than perhaps any other company, but it cannot lay claim to being the first automaker to offer a seatbelt airbag. Nor can it claim to be the second. Those two spots go to the Ford Explorer and Lexus LFA, both of which came out with seatbelt airbags in 2010.

Nevertheless, Mercedes isn’t the sort of company to let the glory of being first get in the way of doing something worthwhile, and so its new Beltbag system for rear seat occupants will be coming to a luxury car near you soon. Our best guess is that the inflatable straps will debut on the redesigned S-Class that bows in the first half of next year, and then quickly proliferate throughout the brand’s lineup.

Like the Fordsystem, Mercedes’ Beltbag system is relegated to rear seats only and powered by charged gas that inflates the strap to nearly three times its normal width, thus increasing the surface area across which to distribute the impact forces of a crash. Unlike the Ford system, Mercedes says only a frontal impact will trigger its belts to inflate, whereas the Explorer’s inflatable bags are triggered by both frontal and side impacts.

 

from Autoblog

From Ars Technica: Viruses used in vaccines can recombine—and get virulent

The first successful vaccines, like Jenner’s smallpox vaccine and the first Salk vaccine against polio, were based on viruses that do not cause illness or severe symptoms. Vaccine development has since shifted largely to the use of proteins that are used by the disease-causing agents, but there are still some cases where a dead or attenuated virus is the most effective method of generating immunity.

The use of viruses for vaccines, however, has always come with a bit of a concern. When it comes to viruses, one-in-a-million events happen all the time, and evolution gives any viruses used in vaccines a lot to work with: many related viruses in the wild, and animal genomes that are littered with pieces of former viruses. Now, researchers have discovered a case where two different agricultural vaccines have recombined to create a new, virulent strain of the disease they were intended to prevent.

In poultry, a form of herpesvirus (gallid herpesvirus 1) causes a respiratory disease that is sometimes fatal; even if it doesn’t kill the animals, it causes a reduced egg production. As a result, several vaccines have been developed against the virus responsible, based on attenuated forms that do not cause serious illness. Three of these vaccines are approved for use in Australia: two based on viral strains that are present in Australia, and a third developed against a strain common in Europe.

 

from Ars Technica