A coroner has written to the health secretary calling for all pregnant women and those who breastfeed to take vitamin D.
North London coroner Andrew Walker said action should be taken to reduce the risk to others after he held an inquest last week into the death of a three-month-old boy.
In his letter to Andrew Lansley, Mr Walker said Milind Agarwal was taken to the doctor in July with symptoms of a probable viral infection.
He was sent home with saline nasal drops. A later telephone consultation with another doctor led to his parents being advised to give him paracetamol.
But his mother and father still had concerns and called an ambulance. Their son was taken to Northwick Park Hospital in north London “where it was recognised he was seriously unwell”.
The baby died from septic inflammation of the heart against a background of an abnormal aortic heart valve.
A consultant paediatric pathologist told the coroner’s court that vitamin D deficiency played a role in progression of the infection and suggested all pregnant and breastfeeding women be prescribed vitamin D daily.