A commission of inquiry into the deaths of two children who died after receiving a mumps, measles and rubella vaccination is due to start next week.
The three-person commission includes respected local judge Tuiloma Neroni Slade as chairman, and two members from the medical practitioner and nursing sectors respectively.
The commission of inquiry, scheduled for three days from next Monday, will investigate the cause of deaths of two 1-year-old children who died almost immediately after getting an MMR shot at Savaii's Safotu District Hospital on July 6.
It comes after the second of two nurses was charged with manslaughter just over two weeks ago.
The charge was in relation to one of the two children who died. Another nurse was earlier charged with manslaughter after being charged with negligence and conspiracy to defeat the course of justice.