On May 18, 2022, Massachusetts health officials and the Centers for Disease Control and Prevention confirmed a single case of monkeypox in a patient who had recently traveled to Canada. Cases have also been reported in the United Kingdom and Europe.
The following essay is reprinted with permission from The Conversation, an online publication covering the latest research.
A cousin of smallpox Monkeypox is caused by the monkeypox virus, which belongs to a subset of the Poxviridae family of viruses called Orthopoxvirus. This subset includes the smallpox, vaccinia and cowpox viruses. While an animal reservoir for monkeypox virus is unknown, African rodents are suspected to play a part in transmission. The monkeypox virus has only been isolated twice from an animal in nature.
The first reported cases of monkeypox in the U.S. was in 2003, from an outbreak in Texas linked to a shipment of animals from Ghana. There were also travel-associated cases in November and July 2021 in Maryland. Health officials are worried the virus may currently be spreading undetected through community transmission, possibly through a new mechanism or route. Where and how infections are occurring are still under investigation.
While monkeypox is rare and usually non-fatal, one version of the disease kills around 10% of infected people. The form of the virus currently circulating is thought to be milder, with a fatality rate of less than 1%.
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