Liberia is endemic to Lassa fever (LF) and has the largest reported per capita incidence of LF patients in the West African region. Cases of the disease increased unprecedentedly in 2019 and 2020, characterized by a geographical drift in epidemiology and seasonal variation of occurrence. This study aims to describe the epidemiological and clinical characteristics of LF in Liberia from 2019 to 2020. A retrospective study was conducted on cases of LF confirmed at the National Public Health Reference Laboratory from January 2019 to December 2020. Medical records were reviewed, and epidemiological and clinical data were collected in an organized manner. Descriptive and inferential statistics were carried out using Epi Info (version 7.2.5.0). A total of 382 suspected LF cases were reported, of which 103 were laboratory-confirmed, yielding a case positivity rate of 27% (103/382). The median age of the LF cases was 20 (IQR: 9-30). Children younger than 18 years accounted for 40.8% (42/103) of the cases and healthcare workers' cases constituted 7.7% of the cases. Bong, Nimba, and Grand Bass accounted for 87.4% of the cases with cases in new counties like Lofa, Margibi, and Grand Kru. Hemorrhage (aOR:10.2; 95% CI: 3.11-33.81), patients who did not receive ribavirin (aOR: 4.4; 95% CI: 1.12-17.57, P = 0.034), and patients aged 40 years or older (aOR: 6.2; 95% CI: 1.19-32.53, P = 0.049) were associated with LF mortality. The LF cases in 2019 and 2020 had a high case fatality rate and spread to new counties that had not previously reported LF. The disease occurred during most of the rainy season instead of the usual dry season. There is an urgent need to lower morbidity and mortality, improve early presentation to the hospital, and early initiation of appropriate medical care.

Liberia reported a large outbreak of measles involving all the counties in 2022. We conducted a descriptive analysis of the measles surveillance data to understand the trend of the outbreak and guide further policy action to prevent future outbreaks. We analyzed the measles surveillance data from Epi week 1 to 51, 2022. All the laboratory-confirmed cases, clinically compatible and epidemiologically linked cases were included in the analysis, the variables of interest included the patient's age, sex, place of residence, measles classification, measles vaccination status, and outcome. We cleaned and analyzed the data using R version 4.2.0 and Arc GIS Pro. The demographic characteristics of the cases were presented, the progression of the cases was presented in Epicurve and the spatial distribution and the case fatality rate (CFR) of the case were presented at the district level using the Arc GIS Pro. The median age of the cases was 4 years (interquartile range: 2-8 years). Children under five years of age constituted 60% of the cases (4836/8127), and females accounted for 52% (4204/8127) of the cases. Only 1% (84/8127) of the cases had documentary evidence of receiving at least one dose of measles-containing vaccine (MCV). Only 3 out of 92 health districts in the country did not report a case of measles during the period under review. The overall cases fatality rate was 1% however CFR of up to 10% were reported in some districts. The outbreak of measles involved almost all the districts of the country, exposing a possible nationwide suboptimal immunization coverage for MCV. The high CFR reported in some districts needs further investigation.

Background: Globally, healthcare systems are currently facing a significant challenge in terms of antibiotic resistance. Healthcare professionals actively participate in the process of prescribing, dispensing and administering antibiotics. Objective: We examined the knowledge, attitudes and practices regarding antibiotic use and antibiotic resistance among healthcare professionals working in a tertiary hospital located in Monrovia, Liberia. Methods: A hospital-based cross-sectional survey was carried out from January to June, 2023 involving 61 healthcare workers at the ELWA Hospital, Liberia. A purposive sample of healthcare workers across diverse professional roles was surveyed using a structured questionnaire on antibiotic use and resistance. Data were analyzed in SPSS v25 using descriptive statistics to summarize participant characteristics and inferential tests to explore variable associations. Results: Participants ages ranged from 20 to 60 years (mean = 40.7 ± 5) and nurses constituted the majority professional group (59%). Most respondents (68.9%) disagreed that antibiotics are effective against viral infections (OR = 0.45; p = 0.020). However, 36.1% believed antibiotics could be stopped when symptoms resolve and 24.6% believed leftover antibiotics could be reused (OR = 0.33; p = 0.002). Majority, 72.1% and 70.5%, reported never using antibiotics for body pain or headaches, respectively (OR = 3.67; p = 0.001 and OR = 4.78; p < 0.001). Despite this, 39.3% admitted to sometimes or always storing leftover antibiotics and 39.3% agreed or strongly agreed that stopping antibiotics early is safe (OR = 0.36; p = 0.016). Conclusion: The study identified persistent gaps in healthcare workers’ knowledge, attitudes, and practices regarding antibiotic use and resistance, despite encouraging awareness in some areas. Misconceptions such as premature discontinuation and reuse of leftover antibiotics were common. Findings underscore the need for targeted education and strengthened stewardship programs in Liberia’s healthcare settings. Plain Language Summary: This study looked at how healthcare workers in Monrovia, Liberia understand and use antibiotics. It focused on their knowledge, beliefs, and everyday practices related to antibiotic use and resistance, a growing global health problem. Researchers surveyed 61 healthcare workers at ELWA Hospital, a major health facility in Monrovia. Participants included nurses, doctors, pharmacists, lab technicians, and midwives. They answered a structured questionnaire designed to measure what they know, how they feel, and what they do when it comes to antibiotics. The study found that most healthcare workers knew that antibiotics do not work against viruses and should not be used for things like headaches or body pain. However, many still held incorrect beliefs like thinking it is okay to stop antibiotics early or reuse leftover medicine. Nearly 40% admitted to storing leftover antibiotics, and some disposed of them improperly. On the positive side, most participants followed infection prevention guidelines and recognized antibiotic resistance as a serious public health threat. Antibiotic resistance makes infections harder to treat and is especially dangerous in places with limited healthcare resources. Healthcare workers play a key role in preventing resistance, so it is important they have accurate information and follow best practices. The study shows that while awareness is improving, there are still gaps that need to be addressed. Targeted training and stronger hospital policies can help healthcare workers use antibiotics more responsibly and protect public health in Liberia.

Insect-borne viruses may account for a significant proportion of non-malaria and non-bacterial febrile illnesses in Liberia. Although the presence of many arthropod vectors has been documented, the collective burden of arbovirus infections and baseline pre-existing immunity remains enigmatic. Our goal was to determine the seroprevalence of arbovirus exposure across the country using a resource-sparing, multiplex immunoassay to determine IgG responses to immunodominant antigens. 532 human serum samples, from healthy adults, collected from 10 counties across Liberia, were measured for IgG reactivity against antigens of eight common flavi-, alpha-, and orthobunya/nairoviruses suspected to be present in West Africa. Approximately 32.5% of our samples were reactive to alphavirus (CHIKV) E2, ~7% were reactive separately to West Nile (WNV) and Zika virus (ZIKV) NS1, while 4.3 and 3.2% were reactive to Rift Valley Fever virus (RVFV) N and Dengue virus-2 (DENV-2) NS1, respectively. Altogether, 21.6% of our samples were reactive to ≥1 flavivirus NS1s. Of the CHIKV E2 reactive samples, 8.5% were also reactive to at least one flavivirus NS1, and six samples were concurrently reactive to antigens of all three arbovirus groups, suggesting a high burden of multiple arbovirus infections for some participants. These insights suggest the presence of these four arbovirus families in Liberia with low and moderate rates of flavi- and alphavirus infections, respectively, in healthy adults. Further confirmational investigation, such as mosquito surveillance or other serological tests, is warranted and should be conducted before initiating additional flavivirus vaccination campaigns. The findings of these studies can help guide healthcare resource mobilization, vector control, and animal husbandry practices.

The SARS-CoV-2 pandemic ignited global efforts to rapidly develop testing, therapeutics, and vaccines. However, the rewards of these efforts were slow to reach many low- to middle-income countries (LMIC) across the African continent and globally. Therefore, two bead-based multiplexed serological assays were developed to determine SARS-CoV-2 exposure across four counties in Liberia. This study was conducted during the summer of 2021 on 189 samples collected throughout Grand Bassa, Bong, Margibi, and Montserrado counties. Our multiplexed immunoassay (MIA) detected elevated exposure to SARS-CoV-2 and multiple variant antigens. Additionally, we detected evidence of exposure to Dengue virus serotype 2, Chikungunya virus, and the seasonal coronavirus NL63. Our multiplexed inhibition test (MINT) was developed from the MIA to observe antibody-mediated inhibition of SARS-CoV-2 spike protein binding to its cognate cellular receptor ACE-2. We detected inhibitory antibodies in the tested Liberian samples, which were collectively consistent with a convalescent serological profile. These complementary assays serve to supplement existing serological testing needs and may enhance the technical capacity of scientifically underrepresented regions globally.

Background: Antibiotic resistance (ABR) is a critical global health threat, disproportionately affecting low- and middle-income countries (LMICs) where systemic constraints, economic pressures and sociocultural factors drive inappropriate antibiotic use. While quantitative studies describe prevalence patterns, they fail to capture the underlying motivations and contextual barriers influencing prescribing and dispensing behaviors. This systematic review synthesizes qualitative evidence on the perceptions of healthcare professionals, patients, and caregivers regarding antibiotic use and explores the barriers and facilitators for implementing antibiotic stewardship programs in LMIC healthcare settings. Methods: We conducted a systematic review following PRISMA 2020 guidelines, based on a registered protocol in PROSPERO ID: CRD42024583749. Searches were performed in Medline, Embase, Cochrane Library, Web of Science, and Google Scholar for English-language studies published between 2014 and 2024. Qualitative and mixed-method studies examining stakeholder perspectives on antibiotic use and antibiotic stewardship implementation in LMICs were included. Studies were excluded if they focused exclusively on pediatric or neonatal populations, veterinary medicine, or quantitative outcomes without qualitative components. The data were analyzed using thematic analysis to identify and categorize codes and identify themes following methodological quality assessment of included studies using the Critical Appraisal Skills Programme Qualitative Studies Checklist by two independent reviewers. Results: Out of 2214 studies screened, a total of 119 studies from 33 LMICs were included, encompassing over 4000 participants across hospital, primary care, and community settings. Five interlinked themes emerged: (1) antibiotic use as a pragmatic response to diagnostic uncertainty and resource constraints; (2) financial and commercial drivers shaping prescribing and dispensing practices; (3) the disconnect between knowledge, sociocultural norms, and clinical behavior; (4) multi-level structural and professional barriers to antibiotic stewardship implementation; and (5) the critical role of health system vulnerabilities in perpetuating misuse. Conclusions: Inappropriate antibiotic use in LMICs reflects rational adaptations to systemic limitations rather than isolated knowledge gaps. Effective ABS strategies must address structural deficiencies, economic incentives, and sociocultural norms, while integrating context-specific interventions that strengthen health systems and engage all levels of care. The findings should, however, be evaluated in light of the geographic unevenness of the evidence base, the exclusion of non-English and gray literature, and lack of certainty assessments for synthesized themes.