By Steve Rosenberg BBC Health EditorIn the UK, more than 4,000 cases of the new strain pneumococcal meningitis have been reported, the highest figure since December 2016, when more than 3,400 cases were reported.
The outbreak has now spread to other parts of the UK.
Pneumococcal strains, or bacteria, are usually transmitted through a cough, sneeze or coughing.
A person can develop pneumonia or sepsis from this type of infection.
The pneumococcus can cause a variety of illnesses including:The strain of pneumococci that has been spreading in the UK has the most cases of meningomycosis reported to date.
The new strain is thought to be linked to a group of people living in the capital, London, who are known as the “London men” because of the large numbers of men who are infected.
It is thought that the new pneumococcis strains has been circulating in the city for more than a year.
The outbreak has prompted London’s Metropolitan Police to warn that people should stay indoors and keep doors and windows locked at all times, including at weekends.
In London, people should also avoid outdoor activities like cycling, running, or running in the parks, the Metropolitan Police said.
The Metropolitan Police also issued advice to residents of nearby boroughs including Barking, Hammersmith and Fulham.
In a statement on Twitter, the mayor of London, Sadiq Khan, said: “If you are at home on Saturday evening or Sunday night, be sure to stay indoors.
Get some rest.
If you are outside, be cautious of your surroundings.
There is no reason to panic.
The UK is the world’s largest source of pneumococcosis, with a total of 4,721,000 infections in 2017, according to the World Health Organization.
Of the 4,077,000 pneumocococcotic infections, 1,851,000 were diagnosed in London.
More than 90 per cent of these cases were in adults.