A child has become the third person to die from a Strep A infection in the past week.
Health officials said the child had gone to a school in Ealing in west London.
Dr Yimmy Chow, health protection adviser at UK Health Security, said: “We are deeply saddened to hear of the death of a child at St John’s Primary School, and Our condolences to her family, friends and school community.
“Working with Ealing Council’s public health team, we have issued preventive advice to the school community to help prevent further cases and we continue to monitor the situation closely.”
Two other students have died from the infection in the past seven days.
one is one students at an elementary school near Cardiff.
Health officials announced their deaths on Thursday.
Last Friday, a 6 year old baby died following an outbreak at Ashford Church of England School in Surrey.
Group A strep, or Strep A, can cause scarlet fever, throat infections and, in very rare cases, invasive disease.
Dr Chow added: “A group A strep infection often results in mild illness and information has been shared with parents and staff about signs and symptoms.
“These include sore throat, fever and mild skin infections and can be treated with adequate antibiotics from a GP.
“In rare cases, this can be a serious illness and anyone with a high fever, severe muscle aches, pain in one area of the body, and unexplained vomiting or diarrhea should call.” to NHS 111 and seek immediate medical help.”
Strep A can be spread through coughing, sneezing, and skin-to-skin contact. People over the age of 65, people with HIV, using steroids or other medications, or with diabetes, heart disease, or cancer are most at risk.
The UK Health Security Agency (UKHSA) says figures for the disease are higher this year than they were two years ago.