Aviva Health has reported shaky results for the year ended 31 December 2010.Revenue was down from £106.7m in 2009 to £103.1m and, to add further pain, operating expenses of £103.6m equated to an operating loss of £548,000 before tax. After tax, the loss for the year stood at £460,000 (2009: profit of £1.3m). The firm…