Four more cases of monkeypox have been identified in the UK, bringing the total number of confirmed cases to seven, health bosses have said.
The UK Health Security Agency (UKHSA) has announced three of the cases in London and one in the northeast of England.
Health authorities said they were working to find a link between the four latest cases, all of which were infected in the capital.
General contact is established between two out of four people infected with the virus.
Those in need of care are treated in the infectious disease specialist units at the Royal Free Hospital, Royal Victoria Hospital in Newcastle upon Tyne, and Guys and St Thomas.
New cases with no known link to two other cases were confirmed on May 1 or another announced on May 7.
Dr. Susan Hopkins, Medical Adviser Chief Economist at UKHSA, said: “This is very rare and unusual.
UKHSA is rapidly investigating the source of these infections as evidence suggests there may be community transmission of the monkeypox virus, which is spread by close contact.
A first case is a person who recently traveled to Nigeria, where he is believed to have contracted the infection, before traveling to the UK.
Four new cases were identified as gay, bisexual, or other men who had sex with men, UKHSA said.
The health authority is therefore asking these groups to be on the lookout for possible symptoms, including rashes or sores on any part of the body, and to contact a sexual health service. if they have any worrisome symptoms.
UKHSA says it is working closely with NHS partners to determine if there have been additional cases in recent weeks and international partners to look at whether other countries have experienced an increase. a similar increase in monkeypox or not.
Health authorities stress that the virus is not easily spread between people and the risk to the UK population is low.