This 2003 electron microscope image made available by the Centers for Disease Control and Prevention shows mature, oval-shaped monkeypox virions, left, and spherical immature virions, right, obtained from a sample of human skin associated with the 2003 prairie dog outbreak. The World Health Organization said Friday, May 27, 2022, that nearly 200 cases of monkeypox have been reported in more than 20 countries not usually known to have outbreaks of the unusual disease.
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WHO describes what we know about Monkeypox virus transmission
11:49 - Source: CNN
CNN  — 

The World Health Organization is now counting more than 550 monkeypox cases worldwide, the group’s technical lead for monkeypox, Rosamund Lewis, said Tuesday on CNN International.

“We actually have today a count of over 550 confirmed cases in 30 countries across four of WHO’s six regions,” Lewis said.

“What we’re seeing now is really quite different,” she said, given that the outbreak is happening in multiple places at once.

Assistant Scientist Sigrun Haugerud demonstrates how to prepare a test sample, the first step taken when testing for the monkeypox virus at the University of Minnesota's Veterinary Diagnostic Laboratory. At this point the sample is rendered noninfectious. The sample is then moved to another lab for DNA extraction, then to another lab (all in the same building) to have the DNA tested for the presence of the monkeypox virus. The site has been chose by the Center For Disease Control as the national testing site for the virus. At present, the laboratory is preparing the test, using the same state of the art molecular technology as the CDC labs. GENERAL INFORMATION: 7/31/03- Falcon Heights, MN - The University of Minnesota's Veterinary Disease Control Laboratory has been chosen by the Center For Disease Control as the national testing site to screen for the monkeypox virus in animals.
Assistant Scientist Sigrun Haugerud demonstrates how to prepare a test sample, the first step taken when testing for the monkeypox virus at the University of Minnesota's Veterinary Diagnostic Laboratory. At this point the sample is rendered noninfectious. The sample is then moved to another lab for DNA extraction, then to another lab (all in the same building) to have the DNA tested for the presence of the monkeypox virus. The site has been chose by the Center For Disease Control as the national testing site for the virus. At present, the laboratory is preparing the test, using the same state of the art molecular technology as the CDC labs. GENERAL INFORMATION: 7/31/03- Falcon Heights, MN - The University of Minnesota's Veterinary Disease Control Laboratory has been chosen by the Center For Disease Control as the national testing site to screen for the monkeypox virus in animals.
Judy Griesedieck/Star Tribune/Getty Images

Related article Plans underway to ramp up monkeypox testing if outbreak grows quickly

“We’re seeing cases all appearing in a relatively short period of time. We’re seeing that in a few days, in a couple of weeks, we’re seeing over 500 cases. This is different. This has not been seen before.”

In an update over the weekend, WHO said that as of Thursday, it had received reports of 257 confirmed monkeypox cases and about 120 suspected cases in 23 nations where the virus is not endemic.

Lewis said WHO does not know the source of the outbreak and called on countries to take advantage of the “window of opportunity” to keep cases from unfolding into a greater outbreak.

The group said in its weekend briefing that the global public health risk level is moderate, “considering this is the first time that monkeypox cases and clusters are reported concurrently in widely disparate WHO geographical areas, and without known epidemiological links to non-endemic countries in West or Central Africa.”

However, it added, “The public health risk could become high if this virus exploits the opportunity to establish itself as a human pathogen and spreads to groups at higher risk of severe disease such as young children and immunosuppressed persons.”

WHO is urging health care providers to watch closely for possible symptoms such as rash, fever, swollen lymph nodes, headache, back pain, muscle aches and fatigue, and to offer testing to anyone who has these symptoms.

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During a news briefing Monday, Lewis said “we are not concerned of a global pandemic” from monkeypox at the moment.

The virus is not new, she noted on CNNI, but WHO is set to meet this week to establish a research agenda and research priorities for the virus.

“It’s been there before, and we do have a baseline of knowledge that we can build on, but there are many questions still,” she said.