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This image provided by the National Institute of Allergy and Infectious Diseases (NIAID) shows a colorized transmission electron micrograph of monkeypox particles (red) found within an infected cell (blue), cultured in the laboratory that was captured and color-enhanced at the NIAID Integrated Research Facility (IRF) in Fort Detrick, Md. The World Health Organization recently declared the expanding monkeypox outbreak a global emergency. It is WHOâÄ™s highest level of alert, but the designation does not necessarily mean a disease is particularly transmissible or lethal. (NIAID via AP)