Two pupils from the same school died within days of each other after testing positive for coronavirus.
Year 11 student Harry Towers died six days after year 10 pupil Mohammed Habib passed away.
The boys were students at St John Fisher Catholic College in Staffordshire, StaffordshireLive reported.
Mohammed died after suffering a bleed on the brain following a stroke caused by Covid-19, a medical examination revealed.
"The coroner was provided with a cause of death which he was satisfied was natural and further investigations were not required," a spokesman for North Staffordshire Coroner's Court said.
"The cause of death was: 1a Cerebral oedema; 1b Stroke; 2: Covid-19."
An investigation is still ongoing into Harry's death.
Regarding Harry's case, the coroner's spokesman added: "A post-mortem examination has been undertaken and the investigation is still ongoing as a cause of death has not yet been provided.
"At this stage the coroner is expecting that the cause of death may be natural and so an inquest has not been opened."
Harry, who had contracted the virus, died on Saturday, October 30.
It has been reported that pupils at the school had been due to have Covid vaccinations just weeks before the double tragedy.
But only flu vaccinations were given at the school and the Covid jabs were rescheduled for mid-November. It is understood that neither boy had been vaccinated.
Acting headteacher Garrett Murray declined to comment on the coroner's findings, or the delay in the school coronavirus vaccinations.
Staffordshire's director of public health Richard Harling has also so far declined to comment.
