this report was posted as an MMWR Early Release on the MMWR website (https://www.cdc.gov/mmwr).Monkeypox, a zoonotic infection caused by an orthopoxvirus, is endemic in parts of Africa. On August 4, 2022, the U.S. Department of Health and Human Services declared the U.S. monkeypox outbreak, which began on May 17, to be a public health emergency (1,2). After detection of the first U.S. monkeypox case), CDC and health departments implemented enhanced monkeypox case detection and reporting. Among 2,891 cases reported in the United States through July 22 by 43 states, Puerto Rico, and the District of Columbia (DC), CDC received case report forms for 1,195 (41%) cases by July 27. Among these, 99% of cases were among men; among men with available information, 94% reported male-to-male sexual or close intimate contact during the 3 weeks before symptom onset. Among the 88% of cases with available data, 41% were among non-Hispanic White (White) persons, 28% among Hispanic or Latino (Hispanic) persons, and 26% among non-Hispanic Black or African American (Black) persons. Forty-two percent of persons with monkeypox with available data did not report the typical prodrome as their first symptom, and 46% reported one or more genital lesions during their illness; 41% had HIV infection. Data suggest that widespread community transmission of monkeypox has disproportionately affected gay, bisexual, and other men who have sex with men and racial and ethnic minority groups. Compared with historical reports of monkeypox in areas with endemic disease, currently reported outbreak-associated cases are less likely to have a prodrome and more likely to have genital involvement. CDC and other federal, state, and local agencies have implemented response efforts to expand testing, treatment, and vaccination. Public health efforts should prioritize gay, bisexual, and other men who have sex with men, who are currently disproportionately affected, for prevention and testing, while addressing equity, minimizing stigma, and maintaining vigilance for transmission in other populations. Clinicians should test patients with rash consistent with

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us-map.html (Accessed March 20, 2023). § Among mpox-associated deaths (38), data on gender identity was available for 28 (73.7%) decedents. For 10 (26.3%) persons for whom self-reported gender was missing, sex assigned at birth was substituted for gender identity. ¶ Case counts include those who received a positive test result for either Monkeypox virus or orthopoxvirus. ** https://www.cdc.gov/nndss/index.html (Accessed March 20, 2023).

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Proton inventories are reported for the hydrolysis of propionic anhydride at 5, 25, and 45 °C and for succinic anhydride at 25 °C. The secondary /3-deuterium isotope effect (kH/kD) for acetic anhydride-d6 hydrolysis was determined at four different temperatures in the range 3.7-45.2 °C and was found to be about 0.95 in all cases. These data are interpreted in terms of significantly different transition states for hydrolysis of propionic and succinic anhydrides. The transition-state structure involved appears to be related to whether the anhydride is cyclic or acyclic.

Solvoly9is rates were followed as described previously.2 The reported values are the mean of three to five independent measurements. In all cases the fir9t-order rate law was obeyed up to at least 80% reaction completion. Rate constants were calculated by means of a nonlinear least-squares program.

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