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August 10, 2022
2022 Multicountry Outbreak of Monkeypox 
Introduction 
Global Control Efforts  
In May 2022, the International Health Regulations (IHR) 
The IHR Emergency Committee on monkeypox, which 
Focal Point for the United Kingdom notified the World 
advises the WHO Director-General on declaring a PHEIC, 
Health Organization (WHO) that an individual who 
met twice to discuss the outbreak: in June, when there were 
travelled from the United Kingdom to Nigeria had a 
more than 3,000 cases in 47 countries, and in July, when 
confirmed case of monkeypox. The disease has since spread 
there were more than 16,000 cases in 75 countries. The 
to more than 75 countries and territories; as of August 5, the 
committee determined at the first meeting that the event 
U.S. Centers for Disease Control and Prevention (CDC) 
was not a PHEIC and could not reach a consensus on the 
reported more than 28,000 cases worldwide. Almost 90% of 
matter at the second meeting. For more on IHR and PHEIC, 
the reported cases were from 10 countries: the United States 
see CRS In Focus IF12139, U.S. Proposals to Amend the 
(27%), Spain (18%), Germany (10%), the United Kingdom 
International Health Regulations. 
(10%), France (9%), Brazil (5%), the Netherlands (3%), 
Canada (3%), Portugal (3%), and Italy (2%). All related 
On July 23, 2022, WHO Director-General Tedros 
deaths have occurred in Nigeria (3) and Central African 
Ghebreyesus determined the monkeypox outbreak was a 
Republic (2). In July, several Members of Congress sent 
PHEIC, noting, “Although I am declaring a public health 
letters to President Biden urging his Administration to 
emergency of international concern, for the moment this is 
declare a Public Health Emergency (PHE) and to accelerate 
an outbreak that is concentrated among men who have sex 
the federal response to the outbreak. The WHO Director-
with men, especially those with multiple sexual partners. 
General declared monkeypox a Public Health Emergency of 
That means that this is an outbreak that can be stopped with 
International Concern (PHEIC) on July 23, 2022, and U.S. 
the right strategies in the right groups. It’s therefore 
Department of Health and Human Services (HHS) 
essential that all countries work closely with communities 
Secretary Xavier Becerra declared the outbreak a PHE on 
of men who have sex with men, to design and deliver 
August 4, 2022. For more on the domestic response, see 
effective information and services, and to adopt measures 
CRS In Focus IF12186, U.S. Domestic Response to the 
that protect the health, human rights and dignity of affected 
2022 Monkeypox Outbreak. 
communities.” 
Monkeypox Discovery and Transmission   The Director-General provided a number of 
recommendations to stop transmission, including (1) 
Monkeypox is a viral zoonosis (a virus transmitted to 
engage and protect affected communities; (2) intensify 
humans from animals) from the same family of viruses that 
surveillance and public health measures; (3) strengthen 
cause smallpox and carry similar symptoms, including 
clinical management and infection prevention and control 
fever, swelling of the lymph nodes, fatigue, muscle aches, 
in hospitals and clinics; and (4) accelerate research into the 
rashes, and lesions. The symptoms usually resolve on their 
use of vaccines, therapeutics, and other tools.  
own after two to four weeks. Severity varies according to 
age, extent of virus exposure, and patient health status. The 
Control Efforts in Europe 
disease is transmitted from one person to another by close 
As of August 5, monkeypox transmission was highest in 
contact with lesions, body fluids, respiratory droplets, or 
Spain (4,942 cases), Germany (2,887), the United Kingdom 
contaminated materials, such as bedding.  
(2,859), France (2,423), Netherlands (879), Portugal (710), 
and Italy (545). These countries deployed similar mitigation 
The name monkeypox originates from its discovery in 
measures, including contact tracing, testing, provision of 
monkeys in a Danish laboratory in 1958. The first human 
interim guidelines for curbing community transmission, and 
case was identified in a child in the Democratic Republic of 
vaccine rollouts for susceptible groups. On June 14, 2022, 
the Congo in 1970. Various animal species are susceptible 
the European Commission announced that it had, for the 
to the monkeypox virus, though scientists are uncertain 
first time, used the European Union (EU) budget to 
about the origin of the virus and how its circulation is 
purchase almost 110,000 vaccines for monkeypox control 
maintained in nature. Eating undercooked meat and other 
in the EU, Norway, and Iceland. The vaccines are 
animal products of infected animals is a possible risk factor. 
authorized to protect adults against smallpox, but Member 
Until the current global outbreak began, monkeypox was 
States are granting national exemptions for their use against 
generally limited (endemic) to West and Central Africa (as 
monkeypox.  
outlined in red in Figure 1). The identification of cases 
Control Efforts in the United States 
without any travel history to endemic areas is 
unprecedented. With the exception of countries in West and 
On June 28, 2022, the White House announced the first 
Central Africa, the ongoing outbreak is primarily occurring 
phase of the national monkeypox vaccine strategy. The 
among men who have sex with men (MSM) with multiple 
strategy, along with other parts of the national response, 
sexual partners.  
will be coordinated by the National Security Council 
https://crsreports.congress.gov