Interventions to reduce and prevent childhood obesity in low-income and middle-income countries: a systematic review and meta-analysis.

BACKGROUND: 70% of children with obesity and overweight live in low-income and middle-income countries. Several interventions have been done to reduce the prevalence of childhood obesity and prevent incident cases. Hence, we did a systematic review and meta-analysis to determine the effectiveness of these interventions in reducing and preventing childhood obesity. METHODS: We conducted a search for randomised controlled trials and quantitative non-randomised studies published on MEDLINE, Embase, Web of Science, and PsycINFO databases between Jan 1, 2010, and Nov 1, 2022. We included interventional studies on the prevention and control of obesity in children up to age 12 years in low-income and middle-income countries. Quality appraisal was performed using Cochrane's risk-of-bias tools. We did three-level random-effects meta-analyses and explored the heterogeneity of studies included. We excluded critical risk-of-bias studies from primary analyses. We assessed the certainty of evidence using the Grading of Recommendations Assessment, Development, and Evaluation. FINDINGS: The search generated 12 104 studies, of which eight studies were included involving 5734 children. Six studies were based on obesity prevention, most of which targeted behavioural changes with a focus on counselling and diet, and a significant reduction in BMI was observed (standardised mean difference 2·04 [95% CI 1·01-3·08]; p<0·001). In contrast, only two studies focused on the control of childhood obesity; the overall effect of the interventions in these studies was not significant (p=0·38). The combined studies of prevention and control had a significant overall effect, with study-specific estimates ranging between 0·23 and 3·10, albeit with a high statistical heterogeneity (I2>75%). INTERPRETATION: Preventive interventions, such as behavioural change and diet modification, are more effective than control interventions in reducing and preventing childhood obesity. FUNDING: None.

The reemergence of the human monkeypox: strengthening Africa's epidemic preparedness and response system.

The reemergence of the monkeypox (MPX) virus poses a serious threat to global health security. While the first human case was reported in Democratic Republic of Congo in 1970, a recent outbreak of this disease in May 2022 has gone 'viral,' spreading to most continents and occurring in nonendemic countries. Outside Africa, there have been reports of cases of MPX in countries such as Singapore in May 2019, Israel in September 2018, UK in September 2018, among others which have been traced back to importation of infected wild rodents from Africa. The Centers for Disease Control and Prevention (CDC) recommends that the standard laboratory facility to carry out MPX tests is Biosafety Containment Level (BSL)-2 working standards if the laboratory staff has taken smallpox vaccine within the last 3 years and BSL-3 working standards if the laboratory staff has not taken the smallpox vaccine. However, African countries have a shortage of BSL laboratories. Hence, there is a need to improve the integrated surveillance of the MPX virus, strengthen diagnostic capacity, capacity building of health workforce, public education programs, fund research, and development, among others. Leveraging a 'One Health' approach will offer fresh insight into the human-animal-environment interface and boost the understanding on the possibility and mechanisms of spillback and reverse zoonosis as well as disease severity and risk factors for severe disease as well as its epidemiology in various subpopulations. Not leaving Africa behind in the prevention, diagnosis, and management of MPX is important to stopping the spread and reemergence of this virus.