Is our abuse of the planet to blame? The first case of a more spreadable strain of mpox has been detected in the UK. Some think climate change has fuelled its spread.
Mpox virus sparks global health alert
Deadly: The first Clade 1b mpox patient is being treated at the specialist infectious diseases unit at London's Royal Free hospital. They had recently been on holiday to Africa and their close contacts are being traced. Glossary
Democratic Republic of Congo - A country in central Africa with a population of 99 million.
World Health Organisation - The United Nations agency responsible for global public health.
Smallpox - A disease estimated to have killed 300 million people in the 20th Century.
Lesions - An area of abnormal tissue in the body, caused by injury or disease.
Mutant - An organism that is different to others in the same species due to genetic changes.
Endemic - Common to a particular place or community.
Plague - A deadly disease that spreads between people.
Bacteria - A large group of single-cell microorganisms. Some cause disease in animals and humans.
Lyme disease - All illness caused by bacteria-carrying tick bites.
Scrofula - An infection in the lymph nodes of your neck.
Typhoid - A dangerous bacterial infection.
Cholera - A dangerous infection, still present in some parts of the world that is usually caught from drinking unclean water.