abstract:XDR (eXtended Dynamic Range, also known as SDR (Super Dynamic Range)) is a quality-control and duplication process for the mass-production of pre-recorded audio cassettes. It is a process designed to provide higher quality audio on pre-recorded cassettes by checking the sound quality at all stages of the tape duplication process.
And that's why people like Lawrence Gostin are rethinking what public health authorities should do about people with suspected XDR-TB in the weeks before the diagnosis is in.