With reference to the reported exodus of highly trained specialists leaving the Livingstone Tertiary Hospital due to the dire state of the hospital, (a) what is the detailed breakdown of (i) the number of specialists who have left the hospital since 1 January 2022 and (ii) the number of vacancies currently exist within the hospital (aa) in total and (bb) in each department and (b) what steps have been taken by his department to address the shortage of specialists and staff at the hospital?