Retraction Note: Hybrid harmony search algorithm for social network contact tracing of COVID-19.

[This retracts the article DOI: 10.1007/s00500-021-05948-2.].

Hybrid harmony search algorithm for social network contact tracing of COVID-19.

The coronavirus disease 2019 (COVID-19) was first reported in December 2019 in Wuhan, China, and then moved to almost every country showing an unprecedented outbreak. The world health organization declared COVID-19 a pandemic. Since then, millions of people were infected, and millions have lost their lives all around the globe. By the end of 2020, effective vaccines that could prevent the fast spread of the disease started to loom on the horizon. Nevertheless, isolation, social distancing, face masks, and quarantine are the best-known measures, in the time being, to fight the pandemic. On the other hand, contact tracing is an effective procedure in tracking infections and saving others' lives. In this paper, we devise a new approach using a hybrid harmony search (HHS) algorithm that casts the problem of finding strongly connected components (SCCs) to contact tracing. This new approach is named as hybrid harmony search contact tracing (HHS-CT) algorithm. The hybridization is achieved by integrating the stochastic hill climbing into the operators' design of the harmony search algorithm. The HHS-CT algorithm is compared to other existing algorithms of finding SCCs in directed graphs, where it showed its superiority over these algorithms. The devised approach provides a 77.18% enhancement in terms of run time and an exceptional average error rate of 1.7% compared to the other existing algorithms of finding SCCs.

COVID-19-related conspiracy beliefs and their determinants among 18 to 45 years old: A cross-sectional study.

The existence of conspiracy beliefs has been previously linked to multiple individual traits and factors, such as anxiety, lack of information, education, and social factors. This study aims to explore the factors and variables influencing the individual's susceptibility to conspiratorial thinking, as well as the impact of COVID-19 conspiracy belief on the adoption of public health and social measures. This study explores the factors influencing the susceptibility to conspiratorial thinking and the impact of conspiracy theories on the adoption of public health and social measures. A sample of university students, fresh-graduates, and mid-career professionals between the age of 18 to 45 years old completed an online survey measuring COVID-19 conspiracy beliefs and stress levels. A total of 2417 completed a survey targeting COVID-19 conspiracy beliefs, perceived stress, and demographic information. The results show that COVID-19 conspiracy beliefs were related to education, unemployment, and COVID-19 level of exposure. Meanwhile, conspiracy beliefs had no relation to the individual's perceived self-reported stress. Higher conspiracy scores were related to lower adoption of preventive measures and increased hesitancy towards COVID-19 vaccination. Lack of knowledge and misinformation actions play a vital role in the generation of conspiracy theories surrounding the COVID-19 pandemic.

Counselling of non-communicable diseases' patients for COVID-19 vaccine uptake in Jordan: Evaluating the intervention.

BACKGROUND: People with noncommunicable diseases (NCDs) are at a significantly higher risk of worst outcomes if infected with COVID-19 and thus amongst the main target population for vaccination. Despite prioritizing them for vaccination, the number of vaccinated patients with comorbidities stalled post vaccine introduction. Despite that the government along with partners ran a national awareness campaign to ramp up vaccination coverage, the coverage remained suboptimal. Thus, a one-to-one health counselling initiative was implemented to explore the acceptance of COVID-19 vaccines by the NCDs patients and address the main issues surrounding vaccine hesitancy. This study evaluates the impact of this intervention by analyzing the change in COVID-19 vaccine acceptance. METHODS: In this analytical observational study, a random sample of 57,794 people living with NCDs were approached. Out of them, 12,144 received one-to-one counselling by a group of trained health professionals. The counselled group's vaccine acceptance was assessed on a Likert scale from 1 to 5 pre- and post- counselling. Moreover, a random sample was followed up 2 months after initial counselling to measure their vaccine acceptance and update their vaccination status. RESULTS: 44.5% of total respondents were already registered in the vaccination platform. On a scale from 1 to 5, the overall mean confidence significantly increased by 1.63 from 2.48 pre-counselling to 4.11 post-counselling. Two-months post counselling, a random sample was contacted again and had a mean vaccine confidence of 3.71, which is significantly higher than pre-counselling confidence level despite a significant decrease to post-counselling results. DISCUSSION: Implementing an intervention that targets all key factors impacting health decisions, such as health literacy, risk appraisal and response efficacy, helps reach an adaptive response and increase vaccine confidence. Scholars should be cautious when implementing an intervention since it could lead to maladaptive defensive responses. One-to-one interventions are more effective in population when addressing new interventions and vaccines.

Impact of COVID-19 Exclusive Allocation Strategy on Quality of Healthcare: A Study From Jordan, 2020.

The COVID-19 pandemic has brought uncertainty to everyday medical practice. Deciding how to ration limited healthcare resources is difficult and requires the involvement of higher authorities in each country. In this article we focus on the Jordanian strategy of allocating tertiary healthcare centers exclusively for COVID-19 patients and postponing all other treatments and healthcare provision. We collected secondary data on admissions, occupancy of hospital beds, and length of stay at emergency departments and outpatient clinics, as well as surgeries conducted, between March and May 2020 at King Abdullah University Hospital in Irbid, Jordan. We also conducted a literature review to explore health resource utilization and allocation in terms of health service quality. Our findings showed a major decrease in the demand for health services at the hospital including admissions, emergency department visits, outpatient clinic visits, surgeries, and radiology during the study period. These findings indicate the enormous impact of the pandemic on the largest segment of patients in Jordan-those who depend on government health insurance-to manage their routine healthcare needs, which may affect the health status of patients. Authorities should address the COVID-19 pandemic holistically by prioritizing both COVID-19 cases and non-COVID-19 cases and should draft a framework for managing future pandemics. Moreover, planning a strategy to accommodate the number of people waiting for elective surgeries and routine healthcare should be in place to minimize the burden of this pandemic.

Pharmacists-physicians collaborative intervention to reduce vaccine hesitancy and resistance: A randomized controlled trial.

PURPOSE: Given their negative influence on community health, vaccine hesitancy and resistance are emerging challenges that require healthcare intervention. Therefore, this study aimed to assess the impact of physician-pharmacist collaborative health coaching on rates of hesitancy and resistance for a COVID-19 vaccine. METHODS: After an initial assessment of rates of hesitancy and resistance for a COVID-19 vaccine was conducted, hesitant and resistant participants were approached, recruited, and randomized into an active and control group. Pharmacists-physicians collaborative coaching intervention was delivered to active group subjects over two months through Facebook live sessions. The outcome measures were assessed in both groups before coaching, directly after coaching, and a month after coaching. RESULTS: The proportions of hesitancy and resistance for a COVID-19 vaccine among subjects in the active group were significantly reduced from 64.3% and 35.7% before coaching to 20.1% and 7.8% directly after coaching, respectively. These proportions were further reduced to 11.1% and 3.3% a month after coaching, respectively. Furthermore, the mean scores for knowledge on, and attitude towards COVID-19 vaccine were significantly increased from 4.6 ± 1.8 and 4.1 ± 1.7 before coaching to 7.5 ± 3.1 and 8.9 ± 3.8 directly after coaching, respectively. However, the change in mean score of beliefs about COVID-19 vaccines among active group subjects was not significant. CONCLUSION: High rates of hesitancy and resistance for a COVID-19 vaccine were found in Jordan. These rates can be significantly reduced through online pharmacists-physicians collaborative coaching, which can also improve knowledge of and attitude towards COVID-19 vaccines.

Epidemiology and histopathological classification of lung cancer: A study from Jordan, retrospective observational study.

BACKGROUND: Lung cancer is a major health burden in Jordan. With the failure of tobacco control policies and the evolution of new smoking methods like water pipes and e-cigarettes, lung cancer is projected to further increase. This study investigates the epidemiology and the different histopathological subtypes of lung cancer in correlation with age, sex and smoking. MATERIAL AND METHODS: 434 tumors diagnosed in the main tertiary hospital in Northern Jordan throughout the period of 2004-2017 were included. Specimens were tested by H&E and immunohistochemical stains. Clinical data were collected from patients' medical files. IRB approval number 310/2016 was granted by Jordan University of Science and Technology review board. RESULTS: 86.9% of cases were males compared to 13.1% in females obtaining a male:female ratio of 6.6:1. The mean age was 63.8 years with a range of 28-103 years. Prevalence of cases increased with increasing age and smoking. Histopathologically, adenocarcinoma accounted for over half of the cases followed by Squamous cell carcinoma (SCC) and neuroendocrine tumors (NET) in both sexes. Adenocarcinoma had the lowest mean age; 62.74 years, while SCC had the highest mean age with 65.42 years. All subtypes increased with age but in different degrees. The increase was more pronounced in SCC and NET and less with adenocarcinoma. Adenocarcinoma was more common in both smokers and non-smokers. However, smokers to non-smokers ratio differed; where it was the highest in NET (6:1) compared to 4:1 in SCC and 2:1 in adenocarcinoma. CONCLUSION: Median age of our patients was slightly lower than that previously reported in Jordan. This study also showed an increase in the relative incidence of adenocarcinoma compared to SCC.

Prevalence and Detection of Sexually Transmitted Cases of Laryngeal Carcinoma.

INTRODUCTION: Human papillomavirus (HPV) is among the reported etiologies of laryngeal squamous cell carcinoma (LSCC). Understanding the impact of HPV on LSCC may help reduce its incidence. This study investigates the association between HPV and LSCC as well as the roles for different immunohistochemical stains in HPV detection. METHODS: A total of fifty-two formalin-fixed, paraffin-embedded tissue samples of LSCC, diagnosed between 2005 and 2015, were obtained from the archives of the Pathology Department. The samples were stained and processed to evaluate the relationship of HPV to LSCC. RESULTS: Patients had a mean age of 65.02 ± 14.341 years. By polymerase chain reaction (PCR), high-risk strains of HPV were detected in 15.4% of tissue samples. HPV-16 was found in 75% of the positive samples for an overall prevalence of 13.5%. P16 immunostaining was positive in 15.4% of cases while cyclin B and cyclin E were positive in 65.4% and 76.9%, respectively. Over half of the cases were histologically graded as moderately-differentiated, 28.8% as well-differentiated, and 15.4% as poorly-differentiated. DISCUSSION: The prevalence of HPV-positive LSCC was lower than previously stated in the literature. HPV-16 was the most commonly detected subtype, in concordance with the findings of multiple other studies. HPV-positive LSCC trended with higher histologic grade. P16 and cyclin E immunohistochemical stains were of limited use in identifying HPV in LSCC. In contrast, cyclin B had a high sensitivity which could be used to rule out HPV in LSCC.