This Agreement sets forth the entire agreement between the parties on the subject matter herein. HALLAL is not relying on any other agreements or oral representations not fully addressed in this Agreement. Any prior agreements between or directly involving HALLAL and ALEXION, including the Employment Agreement, are superseded by this Agreement, except that HALLAL acknowledges that (i) this Agreement shall not in any way affect, modify, or nullify any prior agreement that HALLAL entered into with ALEXION regarding confidentiality, trade secrets, inventions, or unfair competition, and (ii) section 5 (Non-Competition, Non-Solicitation and Non-Disparagement) of the Employment Agreement shall survive and remain in full force and effect. HALLAL further acknowledges that the restraints set forth in section 5 of the Employment Agreement are necessary for the reasonable and proper protection of ALEXION and are reasonable in respect to subject matter, length of time, and geographic area. To the extent of any conflict between the terms of this Agreement and any other document concerning severance benefits, the provisions of this Agreement shall prevail. The headings in this Agreement are provided for reference only and shall not affect the substance of this Agreement.