據稱，護士Lucy Letby將空氣注入嬰兒的血液中，該嬰兒被稱為Child E，於2015年6月在切斯特伯爵夫人醫院死亡。
Wood醫生後來向Letby女士的辯護律師Ben Myers, KC證實，他是唯一負責兒科和新生兒科的高級衛生官員，而Harkness醫生是當晚負責這些科室的唯一註冊醫生。
Doctors used five doses of adrenaline and tried two rounds of resuscitation during a 45-minute battle to save a baby, a murder trial has heard.
Nurse Lucy Letby allegedly injected air into the bloodstream of the baby, known as Child E, who died at the Countess of Chester Hospital in June 2015.
Ms Letby has been charged with murdering seven babies and attempting to murder 10 others at the hospital between 2015 and 2016.
The twins had been born prematurely and Ms Letby was the designated nurse for both boys, the jury was told.
Notes from Doctor Christopher Wood, who was a junior doctor at the hospital in 2015, outlined how a crash call came in late one night in August 2015 for assistance with Child E.
According to his notes at 01:23 BST, cardiopulmonary resuscitation (CPR) was stopped and Child E was cleaned before being given to his parents.
Dr Wood later confirmed to Ms Letby's defence lawyer Ben Myers, KC, that he was the only senior health officer covering paediatrics and the neonatal unit, with Dr Harkness the only registrar covering those units that night.
Dr Wood agreed that he was coming to the end of a four-month training placement and had "very little experience" with neonates.
A nurse, who was on shift the day prior to Child E's collapse and death, later told the jury the infant had been "stable".
Asked for an assessment of Child E, the nurse, who cannot be named for legal reasons, said: "He was doing well on that shift, apart from the high blood sugars."
But the nurse agreed with Mr Myers, KC, that Child E had been born premature and that there were "risks" associated with that.
A court order bans the reporting of the identities of the children allegedly attacked by Ms Letby, while identifying parents or witnesses connected with the children is also banned.