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Acute respiratory tract infections (ARIs) are a leading cause of ill-health and death globally. Individual or multiple micronutrients have been shown to modulate immune function and affect the risk and severity of a number of infectious diseases. We systematically reviewed the evidence on the impact of micronutrient supplements to reduce the occurrence of ARIs and shorten the duration of ARI symptoms among adults. Random effects meta-analyses were conducted to estimate the pooled effects of vitamin D, vitamin C, zinc and multiple micronutrient supplementation (MMS) on the occurrence of ARIs and the duration of ARI symptoms. Vitamin D supplementation reduced the risk of ARI (risk ratio (RR)=0.97; 95% CI 0.94 to 1.00; p=0.028) and shortened the duration of symptoms (per cent difference: −6% (95% CI −9% to −2%; p=0.003)). The RR of vitamin D to prevent ARI was farther from the null when diagnosis was based on clinical diagnosis or laboratory testing, compared with self-report and when the loading dose was <60 000 IU. Vitamin C supplementation reduced the risk of ARIs (RR=0.96; 95% CI 0.93 to 0.99; p=0.01) and shortened the duration of symptoms (per cent difference: −9% (95% CI −16% to −2%; p=0.014)). The effect of vitamin C on preventing ARI was stronger among men and in middle-income countries, compared with women and high-income countries, respectively. Zinc supplementation did not reduce the risk of ARIs but shortened the duration of symptoms substantially (per cent difference: −47% (95% CI −73% to −21%; p=0.0004)). Our synthesis of global evidence from randomised controlled trials indicates that micronutrient supplements including zinc, vitamins C and D, and multiple micronutrient supplements may be modestly effective in preventing ARIs and improving their clinical course. Further research is warranted to better understand the effectiveness that individual or multiple micronutrients have on SARS-CoV-2 infection and treatment outcomes.

Background Potentially inappropriate medications (PIM) are associated with adverse health outcomes. The use of PIM among persons living with HIV (PLHIV) could be more problematic due to peculiarities such as antiretroviral toxicity and drug-disease interactions. However, PIM among PLHIV continues to receive little attention. Therefore, we aimed to systematically review and estimate the prevalence of PIM among PLHIV. Methods We searched the PubMed, Scopus, and Web of Science databases to identify relevant studies from 1 January 2014 to 30 June 2024. Studies included were peer-reviewed articles that determined PIM prevalence using validated explicit or implicit tools and provided statistical information on the measured outcomes. Systematic, narrative, and literature reviews as well as case studies, commentaries, and editorials were excluded. Risk of bias was assessed using the Joanna Briggs Institute Prevalence Critical Appraisal Tool. Subgroup analysis was performed for the different geographic regions, PIM criteria, age, study period, and median numbers of medicines. Statistical heterogeneity was assessed using the I2 statistic. Sensitivity analyses, publication bias, and cumulative meta-analysis were conducted. Results A total of 13 articles, including 3200 PLHIV, were included for the systematic review, while meta-analysis was conducted using 8 studies comprising 2546 PLHIV. Most of the studies (46%) employed a cross-sectional study design. 11 out of the 13 studies were conducted in Europe. Most studies reported benzodiazepines as the most common PIM among PLHIV, while hypertension and dyslipidaemia were identified as the most frequent comorbidities. Overall, the pooled prevalence of PIM was 44.8% (95% CI, 32%-58%) using a random-effect model. PIM prevalence among PLHIV was higher among those exposed to polypharmacy (59.3%; CI: 48.9% – 68.9%), those aged > 70 years (44.6%; CI: 24.1–67.1), and post-COVID (48.9%; CI: 39%-59%). Conclusion This study suggests that PIM exposure among PLHIV is a budding issue. Findings from this review advocate for mitigating measures against PIM use. Also, this review contributes data on the use of PIM across different cohorts, creating awareness for policymakers and health managers. Review registration PROSPERO – CRD42024529411.

Objectives: The objective of this study was to examine the association between several country-level systemic indices and the deaths from COVID-19 across African countries. Method: Regression analyses were conducted to test the association between selected indices and deaths from COVID-19 across African countries. All tests were run at the α = 0.05 level of significance. Result: We found a statistically significant correlation between total COVID-19 deaths per million and Stringency Index ( p -value <0.001) and Human Development Index ( p -value <0.001). Multiple regression analysis showed that Stringency Index was the only variable that remained significant when other factors are controlled for in the model. Conclusion: Countries in Africa with poorer governance, inadequate pandemic preparedness and lower levels of development have unexpectedly fared better with respect to COVID-19 deaths mainly because of having a younger population than the countries with better indices.

IntroductionNigeria has the highest number of maternal deaths globally, and maternal peripartum sepsis is one of the leading causes of maternal mortality. A single oral dose of azithromycin (AZM; 2 g) is safe and effectively reduces 33%–60% of maternal sepsis during planned vaginal birth in low- and middle-income countries (LMICs). However, the clinical and cost-effectiveness of oral AZM during vaginal birth in Nigeria remains unknown in the context of poor antimicrobial stewardship practices, significant antimicrobial resistance and healthcare financing. Evidence is also lacking on the standard care for the prevention of maternal sepsis among pregnant women undergoing vaginal births in Nigeria. The AZIN-V trial is a hybrid type 2 effectiveness-implementation trial to determine the safety, clinical and cost-effectiveness of intrapartum oral AZM versus usual care in the prevention of peripartum maternal sepsis. The trial will also examine the impact of implementation strategies in enhancing adherence to the oral AZM protocol during planned vaginal births and identify effective strategies to improve adherence (fidelity) to the protocol in real-world LMIC settings.Methods and analysisThis is a multicentre hybrid type 2 trial conducted in six Nigerian states: Ebonyi, Edo, Gombe, Kano, Kwara and Lagos. The study aims to simultaneously test the clinical and cost-effectiveness of AZM (clinical trial) and the impact of implementation strategies (implementation research) in Nigeria’s unique healthcare context. The clinical trial is a two-arm, cluster-randomised controlled trial conducted across 48 health facilities, randomly assigned (1:1) to either intrapartum administration of oral AZM (intervention group) or usual care—the current routine practice (control group). A total of 5040 study participants (2520 in each group) will be enrolled in the clinical trial. The implementation trial is a two-arm cluster non-randomised controlled trial conducted in 12 health facilities (1:1) allocated to either a bottom-up approach using the Plan-Do-Study-Act cycle or a usual top-down approach with a one-time training workshop and distribution of clinical guidelines, with both arms administering oral AZM during vaginal birth while assessing fidelity (primary outcome).For the clinical trial, data will be analysed using intention-to-treat statistical methods. The cost-effectiveness outcome will be analysed using the Incremental Cost-Effectiveness Ratio. Implementation outcomes will be analysed using descriptive statistics and a thematic approach.Ethics and disseminationThis study has been approved by the National Health Research Ethics Committee, Nigeria (NHREC/01/01/2007-30/09/2024), the ethics committees of the participating health institutions (Lagos University Teaching Hospital Research Ethics Committee: ADM/DSCST/HREC/APP/6325; University of Ilorin Teaching Hospital Health Research Ethics Committee: ERC/PAN/2025/03/0581; University of Benin Teaching Hospital Health Research Ethics Committee: ADM/E22/A/VOL. VII/483117141; Aminu Kano Teaching Hospital Research Ethics Committee: AKTH/MAC/SUB/12 A/P-3/VI/2509 and Irrua Specialist Teaching Hospital Research Ethics Committee: ISTH/HREC/20241507/605), the Ministries of Health of the six states and the National Agency for Food and Drug Administration and Control. Written informed consent will be obtained from all eligible study participants before enrolment. Results will be shared with communities and policy stakeholders and through peer-reviewed journals and will be presented at conferences.Trial registration numberISRCTN16415327.

Iron deficiency anaemia in pregnancy is a significant contributor to maternal and perinatal morbidity and mortality globally. Despite international and national guidelines for its screening and treatment, knowledge and prescription practices of healthcare providers vary. To determine maternal healthcare workers' screening and treatment practices for iron deficiency in anaemic pregnancy women in two states in Nigeria. This cross-sectional study sampled maternal healthcare workers from 84 randomly selected public health facilities in Lagos and Kano States. Data on methods of diagnosis and prescription practices for iron deficiency anaemia were collected using a self-administered questionnaire. Means and percentages were reported using probability weights, and a comparison of practices of anaemia treatment between doctors and nurses/midwives was done using Chi-square test or Fishers exact. Of the 467 maternal healthcare workers surveyed (232 from Lagos, 235 from Kano), 40.0% were doctors, 54.0% nurses or midwives and 6.0% community health extension workers. In the sample, 27.6% always and 58.7% sometimes screened anaemic pregnant women for iron deficiency; among these, 84.7% screened using complete blood count. Oral iron for treatment of iron deficiency anaemia was prescribed by 96.9%. Intravenous iron for treatment was prescribed by 30.2%, but by only by 18.6% as first-line drug (as iron dextran by 69.3% and as iron sucrose by 31.5% of intravenous iron prescribers). Commonest reasons for low usage of intravenous iron were cost and need for venepuncture. Fifty-three percent of maternal healthcare workers' prescribed iron supplements for anaemia during concomitant infection, with the prescription practice similar among doctors versus nurse/midwives (p = 0.074). We found suboptimal levels of screening for iron deficiency among anaemic pregnant women. Iron deficiency anaemia in pregnancy is almost exclusively treated with oral iron by maternal healthcare workers in the two Nigerian states, similarly between doctors and nurses/midwives. Further research into potential reasons for low screening for iron deficiency and low use of intravenous iron are needed.

Suicidal behaviors are a major public health concern, yet their burden remains poorly defined in Nigeria, a country with a predominantly young population. This study aimed to comprehensively assess the prevalence and correlates of suicidal ideation, planning, and attempt in Nigeria. We systematically searched medical literature databases for studies published up to November 2025 that reported the prevalence of suicidal behaviors in the Nigerian general population or specific subgroups, using diagnoses or validated screening tools. Random-effects meta-analysis were conducted, with heterogeneity explored using meta-regression and subgroup analysis. Overall, 53 studies comprising 132,514 individuals were included. The prevalence of suicidal ideation in the general population was 7.9% (95%CI: 4.6, 13.4), while suicidal planning and attempts were estimated at 1.9% (95%CI: 0.9, 4.0) and 1.3% (95%CI: 0.4, 4.3), respectively. Suicidal ideation was associated with sociodemographic factors, including marital status, educational attainment, and employment status, and was more common in conflict-prone regions. Compared with the general population, suicidal behaviors were more prevalent among adolescents and young people, people living with HIV, and pregnant women. Notably, the prevalence also increased over time. These findings indicate that suicidal behaviors are common in Nigeria and highlight the need for targeted intervention strategies for high-risk populations.

Background Anaemia during pregnancy causes adverse outcomes to the woman and the foetus, including anaemic heart failure, prematurity, and intrauterine growth restriction. Iron deficiency anaemia (IDA) is the leading cause of anaemia and oral iron supplementation during pregnancy is widely recommended. However, little focus is directed to dietary intake. This study estimates the contribution of IDA among pregnant women and examines its risk factors (including dietary) in those with moderate or severe IDA in Lagos and Kano states, Nigeria. Methods In this cross-sectional study, 11,582 women were screened for anaemia at 20-32 weeks gestation. The 872 who had moderate or severe anaemia (haemoglobin concentration < 10 g/dL) were included in this study. Iron deficiency was defined as serum ferritin level < 30 ng/mL. We described the sociodemographic and obstetric characteristics of the sample and their self-report of consumption of common food items. We conducted bivariate and multivariable logistic regression analysis to identify risk factors associated with IDA. Results Iron deficiency was observed among 41% (95%CI: 38 – 45) of women with moderate or severe anaemia and the prevalence increased with gestational age. The odds for IDA reduces from aOR: 0.36 (95%CI: 0.13 – 0.98) among pregnant women who consume green leafy vegetables every 2-3 weeks, to 0.26 (95%CI: 0.09 – 0.73) among daily consumers, compared to those who do not eat it. Daily consumption of edible kaolin clay was associated with increased odds of having IDA compared to non-consumption, aOR 9.13 (95%CI: 3.27 – 25.48). Consumption of soybeans three to four times a week was associated with higher odds of IDA compared to non-consumption, aOR: 1.78 (95%CI: 1.12 – 2.82). Conclusion About 4 in 10 women with moderate or severe anaemia during pregnancy had IDA. Our study provides evidence for the protective effect of green leafy vegetables against IDA while self-reported consumption of edible kaolin clay and soybeans appeared to increase the odds of having IDA during pregnancy. Health education on diet during pregnancy needs to be strengthened since this could potentially increase awareness and change behaviours that could reduce IDA among pregnant women with moderate or severe anaemia in Nigeria and other countries.

Alcohol consumption in Tanzania exceeds the global average. While sociodemographic difference in alcohol consumption in Tanzania have been studied, the relationship between psycho-cognitive phenomena and alcohol consumption has garnered little attention. Our study examines how depressive symptoms and cognitive performance affect alcohol consumption, considering sociodemographic variations. We interviewed 2299 Tanzanian adults, with an average age of 53 years, to assess their alcohol consumption, depressive symptoms, cognitive performance, and sociodemographic characteristics using a zero-inflated negative binomial regression model. The logistic portion of our model revealed that the likelihood alcohol consumption increased by 8.4% (95% confidence interval [CI] 3.6%, 13.1%, p  < 0.001) as depressive symptom severity increased. Conversely, the count portion of the model indicated that with each one-unit increase in the severity of depressive symptoms, the estimated number of drinks decreased by 2.3% (95% CI [0.4%, 4.0%], p  = .016). Additionally, the number of drinks consumed decreased by 4.7% (95% CI [1.2%, 8.1%], p  = .010) for each increased cognitive score. Men exhibited higher alcohol consumption than women, and Christians tended to consume more than Muslims. These findings suggest that middle-aged and elderly adults in Tanzania tend to consume alcohol when they feel depressed but moderate their drinking habits by leveraging their cognitive abilities.

Background Malaria infection during pregnancy has negative health consequences for both mothers and offspring. Sub-microscopic malaria infection during pregnancy is common in most African countries. We sought to identify factors associated with sub-microscopic placental malaria, and its association with adverse pregnancy outcomes among HIV-negative pregnant women in Dar es Salaam, Tanzania. Methods We recruited a cohort of pregnant women during their first trimester and assessed for the occurrence of placental malaria and pregnancy outcomes. The follow-up was done monthly from recruitment until delivery. Histopathology placental malaria positive results were defined as the presence of malaria pigment or parasitized erythrocytes on the slide (histology-positive (HP)), and the sub-microscopic placental infection was defined as positive Plasmodium falciparum DNA by polymerase chain reaction (DNA PCR) amplification in a negative histopathology test. Adverse pregnancy outcomes investigated included low birth weight (birth weight below 2.5 kg), prematurity (live birth below 37 weeks), and small-for-gestational-age (SGA) (live born with a birth weight below 10th percentile for gestational age and sex). Weighted baseline category logit, log-binomial, and log-Poisson models were used to assess factors associated with placental malaria, and its association with adverse pregnancy outcomes. Results Among 1115 women who had histopathology and DNA PCR performed, 93 (8%) had HP placental infection, and 136 (12%) had the sub-microscopic placental infection. The risk of sub-microscopic placental malaria was greater in women who did not use mosquito prevention methods such as bed nets, fumigation, or mosquito coils (odds ratio (OR) = 1.75; 95% confidence interval (CI): 1.05–2.92; P  = 0.03) and in women who were anemic (OR = 1.59; 95% CI: 1.20–2.11; P  = 0.001). Women who were underweight had reduced odds of sub-microscopic placental malaria infection (OR = 0.33; 95% CI: 0.17–0.62; P = 0.001). Women who were overweight/obese had 1.48 times higher the odds of HP placental malaria compared to normal weight (OR = 1.48; 95% CI: 1.03–2.11; P  = 0.03). HP placental malaria infection was associated with an increased risk of SGA births (RR = 1.30, 95% CI: 0.98–1.72, P  = 0.07). In contrast, the sub-microscopic infection was associated with a reduced risk of SGA births (RR = 0.61, 95% CI: 0.43–0.88, P  = 0.01). Placental malaria was not associated with low birth weight or prematurity. Conclusion Malaria prevention methods and maternal nutrition status during early pregnancy were important predictors of sub-microscopic placental malaria. More research is needed to understand sub-microscopic placental malaria and the possible mechanisms mediating the association between placental malaria and SGA.

Background Mental disorders frequently coexist with neurological conditions, impacting the overall health, quality of life, and outcome of affected individuals. In Nigeria, where both neurological disorders and mental health challenges are prevalent, understanding the intersection of these comorbidities is crucial for improving patient outcomes. Objective This study aims to assess the prevalence of psychiatric disorders among people with neurologic conditions in Nigeria and to identify factors that may influence the prevalence rates. Methods Medical literature databases (PUBMED, EMBASE and African Journals Online) were systematically searched to identify published papers on the prevalence of mental disorders among people with neurologic conditions from 2010 to date. Meta-analysis to estimate the pooled prevalences were based on random effects models and heterogeneity was assessed using metaregression and subgroup analyses. Risk of bias in individual studies was evaluated using the NIH Quality Assessment Tool and confidence in the pooled prevalence estimates was assessed using the GRADE approach. Results Eighteen studies among 4,457 individuals were included. Among people with neurologic conditions in Nigeria, the pooled prevalence was approximately 17.6% (95% CI: 10.5%, 28.0%; I 2  = 97%; 15 studies; 3,832 individuals; low certainty) for major depression and 6.4% (95% CI: 3.9, 10.2; I 2  = 23%; three studies; 381 individuals; moderate certainty) for generalized anxiety disorder (GAD). Meta-regression indicated that major depression was more common with advancing age ( p- heterogeneity = 0.010), among females than males ( p- heterogeneity = 0.013), and in the southern regions of the country ( p- heterogeneity = 0.049). The pooled prevalence of major depression was approximately 26.92% (95% CI: 16.44%, 40.82%; I 2  = 95%) among stroke survivors and 11.90% (95% CI: 6.2%, 21.6%; I 2  = 92%) among people with epilepsy. Conclusion Psychiatric morbidity is highly prevalent among people with neurologic conditions in Nigeria and approaches to address both neurological and mental health needs simultaneously may be necessary.