Factors associated with medical students' career choices at a private university: a cross-sectional study.

This study aimed to identify the factors associated with students' career choices and the decision whether they wanted to be trained abroad or in Pakistan. The study utilised a cross-sectional design and was conducted between July 2021 and February 2022. An anonymous survey was distributed among the medical students at Aga Khan University, Karachi, Pakistan. All analysis was carried out using Stata 17. A total of 269 students participated in the study. The most sought-after specialties were surgery 68 (25.3%), medicine 25(9.3%), and paediatrics 14(5.2%), and the decision was highly influenced by positive mentors and lifestyle. In addition, 259 (96%) of the students expressed a desire to practice abroad for training due to higher financial prospects and quality of training. This study revealed that providing enthusiastic mentors may encourage medical students to pursue a broader range of specialties. Furthermore, there is a need for advances in postgraduate training and increase in salaries to restore trust in Pakistan's healthcare system.

Humoral and T cell responses to SARS-CoV-2 reveal insights into immunity during the early pandemic period in Pakistan.

BACKGROUND: Protection against SARS-CoV-2 is mediated by humoral and T cell responses. Pakistan faced relatively low morbidity and mortality from COVID-19 through the pandemic. To examine the role of prior immunity in the population, we studied IgG antibody response levels, virus neutralizing activity and T cell reactivity to Spike protein in a healthy control group (HG) as compared with COVID-19 cases and individuals from the pre-pandemic period (PP). METHODS: HG and COVID-19 participants were recruited between October 2020 and May 2021. Pre-pandemic sera was collected before 2018. IgG antibodies against Spike and its Receptor Binding Domain (RBD) were determined by ELISA. Virus neutralization activity was determined using a PCR-based micro-neutralization assay. T cell - IFN-γ activation was assessed by ELISpot. RESULTS: Overall, the magnitude of anti-Spike IgG antibody levels as well as seropositivity was greatest in COVID-19 cases (90%) as compared with HG (39.8%) and PP (12.2%). During the study period, Pakistan experienced three COVID-19 waves. We observed that IgG seropositivity to Spike in HG increased from 10.3 to 83.5% during the study, whilst seropositivity to RBD increased from 7.5 to 33.3%. IgG antibodies to Spike and RBD were correlated positively in all three study groups. Virus neutralizing activity was identified in sera of COVID-19, HG and PP. Spike reactive T cells were present in COVID-19, HG and PP groups. Individuals with reactive T cells included those with and without IgG antibodies to Spike. CONCLUSIONS: Antibody and T cell responses to Spike protein in individuals from the pre-pandemic period suggest prior immunity against SARS-CoV-2, most likely from cross-reactive responses. The rising seroprevalence observed in healthy individuals through the pandemic without known COVID-19 may be due to the activation of adaptive immunity from cross-reactive memory B and T cells. This may explain the more favourable COVID-19 outcomes observed in this population.

Investigating the impact of prior COVID-19 on IgG antibody and interferon γ responses after BBIBP-CorV vaccination in a disease endemic population: A prospective observational study.

Background and Aims: COVID-19 vaccinations have reduced morbidity and mortality from the disease. Antibodies against severe acute respiratory syndrome coronavirus 2 (SARS­CoV­2) have been associated with immune protection. Seroprevalence studies revealed high immunoglobulin G (IgG) antibody levels to SARS-CoV-2 in the Pakistani population before vaccinations. We investigated the effect of BBIBP-CorV vaccination on circulating IgG antibodies and interferon (IFN)-γ from T cells measured in a cohort of healthy individuals, with respect to age, gender, and history of COVID-19. Methods: The study was conducted between April and October 2021. BBIBP-CorV vaccinated participants were followed up to 24 weeks. Antibodies to SARS-CoV-2 Spike protein and its receptor-binding domain (RBD) were measured. IFNγ secreted by whole blood stimulation of Spike protein and extended genome antigens was determined. Results: Study participants with a history of prior COVID-19 displayed a higher magnitude of IgG antibodies to Spike and RBD. IgG seropositivity was greater in those with prior COVID-19, aged 50 years or younger and in females. At 24 weeks after vaccination, 37.4% of participants showed IFN-γ responses to SARS-CoV-2 antigens. T cell IFN-γ release was higher in those with prior COVID-19 and those aged 50 years or less. Highest IFN-γ release was observed to extended genome antigens in individuals both with and without prior COVID-19. Conclusion: We found that IgG seropositivity to both Spike and RBD was affected by prior COVID-19, age and gender. Importantly, seropositive responses persisted up to 24 weeks after vaccination. Persistence of vaccine induced IgG antibodies may be linked to the high seroprevalence observed earlier in unvaccinated individuals. Increased T cell reactivity to Spike and extended genome antigens reflects cellular activation induced by BBIBP-CorV. COVID-19 vaccination may have longer lasting immune responses in populations with a higher seroprevalence. These data inform on vaccination booster policies for high-risk groups.

Hybridizing video-based learning with simulation for flipping the clinical skills learning at a university hospital in Pakistan.

BACKGROUND: While learning and practicing on actual patients is a major mode of teaching clinical skills, concerns about patient safety, unavailability, and lack of standardization have led to the development of simulation for medical education. Simulation-based teaching is affected by challenges such as lack of protected time for faculty, inexperienced learners, and the number of students per group. These have led to the integration of various eLearning formats in the curriculum. The hybridized format changes the traditional clinical skills teaching into the flipped classroom. This study aims to measure the effectiveness of hybridizing video-based learning with simulation for flipping the clinical skills teaching of fourth-year medical students at the Department of Paediatrics and Child Health at Aga Khan University, Pakistan. METHODS: The study employed a mixed-methods design. Fourth-year medical students of the batch 2020-21 (n = 100) consented to participate in the study. The quantitative component focuses on identifying the effect of the intervention on the perceived self-efficacy of medical students (batch 2020-21) relevant to the clinical skill. Along with this, the performance of the intervention batch of 2020-21 on the end of clerkship objective structured clinical exam (OSCE) was compared with the previous batch of 2019-20, taught using simulation alone. Focused group discussions (FGDs) were used to explore the experiences of medical students (batch 2020-21) about the intervention. Quantitative data underwent descriptive and inferential analysis using Stata v16 while qualitative data underwent content analysis using NVivo software. RESULTS: Hybridization of video-based learning with simulation significantly improved self-efficacy scores for all examinations (cardiovascular, respiratory, neurological, and abdomen) with p-value < 0.05. OSCE scores of the intervention group were significantly higher on the neurological and abdominal stations as compared to the previous batch (p-value < 0.05). In addition, the overall structure of the intervention was appreciated by all the students, who stated it allowed reinforcement of basic concepts, retention, and further insight into clinical applications. CONCLUSION: The hybridization of video-based learning with simulation facilitated in creation of better opportunities for medical students to revive their prior knowledge, apply core concepts for the problem and engage in clinical reasoning.

Needs assessment for faculty development in health professions education at a medical university in Karachi, Pakistan.

Faculty Development (FD) embraces all educational activities used by teachers to improve their knowledge and skills for enhancing their academic competencies. This study aimed to identify the areas in Health Professions Education (HPE) in which formal faculty development is required. A needs assessment survey was conducted from among the faculty members at the Aga Khan University (AKU), Karachi, Pakistan, and the French Medical Institute for Mother and Children, Afghanistan. Data was analysed using SPSS 20.0 and reported frequencies and percentages according to various academic tracks. Competency-based curricula (51%), providing effective feedback (51%), developing Objective Structured Clinical Exam (51%), and clinical supervision (48%) were identified as significant areas for faculty development. Faculty in clinician teacher and clinician educator track require advanced training, i.e., Masters and PhD in HPE. The needs assessment facilitated prioritising the areas for FD. This will contribute to enhancing academic practices and inculcating the culture of lifelong learning.

IgG antibodies to SARS-CoV-2 in asymptomatic blood donors at two time points in Karachi.

INTRODUCTION: An estimated 1.5 million cases were reported in Pakistan until 23 March, 2022. However, SARS-CoV-2 PCR testing capacity has been limited and the incidence of COVID-19 infections is unknown. Volunteer healthy blood donors can be a control population for assessment of SARS-CoV-2 exposure in the population. We determined COVID-19 seroprevalence during the second pandemic wave in Karachi in donors without known infections or symptoms in 4 weeks prior to enrollment. MATERIALS AND METHODS: We enrolled 558 healthy blood donors at the Aga Khan University Hospital between December 2020 and February 2021. ABO blood groups were determined. Serum IgG reactivity were measured to spike and receptor binding domain (RBD) proteins. RESULTS: Study subjects were predominantly males (99.1%) with a mean age of 29.0±7.4 years. Blood groups were represented by; B (35.8%), O (33.3%), A (23.8%) and AB (7%). Positive IgG responses to spike were detected in 53.4% (95% CI, 49.3-37.5) of blood donors. Positive IgG antibodies to RBD were present in 16.7% (95% CI; 13.6-19.8) of individuals. No significant difference was found between the frequency of IgG antibodies to spike or RBD across age groups. Frequencies of IgG to Spike and RBD antibodies between December 2020 and February 2021 were found to be similar. Seropositivity to either antigen between individuals of different blood groups did not differ. Notably, 31.2% of individuals with IgG antibodies to spike also had IgG antibodies to RBD. Amongst donors who had previously confirmed COVID-19 and were seropositive to spike, 40% had IgG to RBD. CONCLUSIONS: Our study provides insights into the seroprevalence of antibodies to COVID-19 in a healthy cohort in Karachi. The differential dynamics of IgG to spike and RBD likely represent both exposure to SARS-CoV-2 and associate with protective immunity in the population.