Mpox: The Reemergence of an Old Disease and Inequities.

Mpox, previously known as monkeypox, is caused by an Orthopoxvirus related to the variola virus that causes smallpox. Prior to 2022, mpox was considered a zoonotic disease endemic to central and west Africa. Since May 2022, more than 86,000 cases of mpox from 110 countries have been identified across the world, predominantly in men who have sex with men, most often acquired through close physical contact or during sexual activity. The classical clinical presentation of mpox is a prodrome including fever, lethargy, and lymphadenopathy followed by a characteristic vesiculopustular rash. The recent 2022 outbreak included novel presentations of mpox with a predominance of anogenital lesions, mucosal lesions, and other features such as anorectal pain, proctitis, oropharyngeal lesions, tonsillitis, and multiphasic skin lesions. We describe the demographics and clinical spectrum of classical and novel mpox, outlining the potential complications and management.

CD4:CD8 ratio in children with perinatally acquired HIV-1 infection.

OBJECTIVES: In adults with horizontally acquired HIV infection, an inverted CD4:CD8 ratio is associated with persistent immune activation, size of HIV reservoir and predicts an increased risk of non-AIDS-defining adverse events. Normalization of this ratio with antiretroviral therapy (ART) is suboptimal in adults, despite viral suppression, and is less well described in paediatric populations. We investigated rates of CD4:CD8 ratio recovery in children with perinatally acquired HIV infection (PaHIV) on ART. METHODS: A cross-sectional, retrospective analysis of routine clinical data in children with PaHIV (5-18 years old) attending a single UK centre was carried out. RESULTS: CD4:CD8 normalization was seen in 62% of children on suppressive ART. A negative correlation was found between current CD4:CD8 ratio and age at start of ART. Positive correlations were found between current CD4:CD8 ratio and total time with suppressed HIV viral load and nadir CD4 counts. Multiple linear regression analysis showed that age at start of ART was significantly associated with current CD4:CD8 ratio (standardized ß = -0.680; P < 0.001). Patient sex, ethnicity and antiretroviral regimen did not affect ratio recovery. CONCLUSIONS: We found higher rates of CD4:CD8 ratio normalization compared with previous adult studies. Children who started ART at a younger age were more likely to recover a normal ratio. The current policy of universal treatment for all HIV-positive adults and children will enhance immunological normalization.