Antibody Response to SARS-CoV-2: A Cohort Study in Qatar's Primary Care Settings.

Globally, countries are rolling out Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) quarantine policies and vaccination programs. Research studies are needed in helping understand the likelihood of acquired immunity to reinfection and identify priority groups for vaccination to inform them. This study aimed to assess period prevalence and longitudinal changes in antibody levels after SARS-CoV-2 infection in Qatari primary care settings. A cohort study design with 2 data collection phases was undertaken-Phase 1 (conducted in July 2020) and Phase 2 (conducted in October 2020). A stratified random sampling technique by age, gender and nationality was utilized to identify the study sample. The total sample size required for the study was estimated to be 2102. Participants were invited to an appointment where they were administered a questionnaire and provided samples for polymerase chain reaction and Immunoglobulin G immunoassay tests. A total of 943 individuals participated in both Phase 1 and Phase 2. In this cohort, seroprevalence of SARS-CoV-2 was found to be 12% (N = 113) in Phase 1 and 17.2% (N = 162) in Phase 2. Of the 113 participants who were seropositive in Phase 1, 38.1% (CI 29.5-47.2%, N = 43) had a reduction, 54.9% (CI 45.7-63.8%, N = 62) had no change, and 7.1% (CI 3.4-12.9%, N = 8) had an increase in IgG titer in Phase 2. All (N = 18) participants aged 10 to 17 years retained their antibodies. The proportion of men who retained their antibodies was slightly higher compared to women-92.5% (N = 74) and 87.9% (N = 29) respectively. Similarly, symptomatic individuals (97.8%; N = 45) had a higher antibody retention compared with asymptomatic individuals (86.4%; N = 57). This study provides preliminary information on the longitudinal changes in antibody levels after SARS-CoV-2 infection. These findings will help inform quarantine policies and vaccination programs.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was funded by PHCC (PHCCDCR202005047).The funders had no role in the design, analysis, interpretation, or writing

Children and adolescents coping with home isolation and social distancing during Covid-19 in Qatar: a cross sectional study with qualitative items

Abstract Background Covid-19 related studies report psychological impacts during home isolation and social distancing. Despite that, children and adolescents were able to adopt coping strategies that assisted in lowering severe levels of psychological disorders. This study aims to report on the psychosocial implications of social distancing and isolation on children of different nationalities who reside in Qatar, and to reveal their coping ways. Methods This is a cross sectional study with qualitative component at its end. The study is a part of a larger study that reported the results of a national screening for psychological disorders experienced by children and adolescents in Qatar. A bilingual online questionnaire included close-ended and one open-ended question to screen for psychological changes and identify coping strategies practiced by children and adolescents (7–18 years) during home-isolation and social distancing. The quantitative questionnaire had five main sections as follows: the sociodemographic characteristics, Spence Children’s Anxiety Scale, Kutcher Adolescent Depression Scale, and Clinical Anger Scale). The last section screened for eight different coping strategies. The summative content analysis was used to analyze the open-ended question “What practices do you do at home that make you happy?”. First, open coding was used (for identification), followed by the axial coding (for comparison), and lasted by sorting of coping strategies inductively. Results Six thousand six hundred and eight (6608) subjects participated between June 23 and July 18, 2020. The clinical outcomes of the study had varying prevalence and levels of severity, which ranged from mild to severe. Higher prevalence was noted for adjustment disorder 66.5% (n = 4396), and generalized anxiety 60% (n = 3858), in comparison to depression 40% (n = 2588). Additionally, participants reported using cognitive, spiritual, social, and physical coping strategies. Eight higher order themes were identified to reflect the coping strategies: playing with siblings or pets, gardening, cooking, practicing arts and crafts, and doing chores. Furthermore, Sociodemographic factors such as ethnicity, religion and family status played a considerable role in choosing the type of coping strategy. Conclusion The uniqueness of the study is bringing the psychosocial implications of social distancing through the voices of children and adolescents, and coping strategies from their perspective. These results are of importance for educational and healthcare systems that are recommended to collaborate even in “normal” times to prepare these age categories for any future crises. The importance of daily lifestyle and family is highlighted as protectors, and crucial factors in emotional management

Epidemiology of SARS-CoV2 in Qatar's primary care population aged 10 years and above

There is an urgent need to elucidate the epidemiology of the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV2) and characterize its potential impact. Investing in characterising the SARS-CoV2 will help plan and improve the response to the pandemic. Furthermore, it will help identify the most efficient ways of managing the pandemic, avoiding public health policies and interventions that may be unduly restrictive of normal activity or unnecessarily costly. This paper describes the design and reports findings of a population based epidemiological study undertaken to characterise SARS-CoV2 in Qatar using limited resources in a timely manner. Asymptomatic individuals ≥10 years registered with Qatar's publicly funded primary health provider were eligible. A stratified random sampling technique was utilized to identify the study sample. Participants were invited to an appointment where they completed a questionnaire and provided samples for polymerase chain reaction and Immunoglobulin M and G immunoassay tests. Data collected were analyzed to calculate point and period prevalence by sociodemographic, lifestyle and clinical characteristics. Of 18,918 individuals invited for the study, 2084 participated (response rate 10.8%). The overall point prevalence and period prevalence were estimated to be 1.6% (95% CI 1.1-2.2) and 14.6% (95% CI 13.1-16.2) respectively. Period prevalence of SARS-CoV2 infection was not considerably different across age groups (9.7-19.8%). It was higher in males compared to females (16.2 and 12.7% respectively). A significant variation was observed by nationality (7.1 to 22.2%) and municipalities (6.9-35.3%). The study provides an example of a methodologically robust approach that can be undertaken in a timely manner with limited resources. It reports much-needed epidemiological data about the spread of SARS-CoV2. Given the low prevalence rates, majority of the population in Qatar remains susceptible. Enhanced surveillance must continue to be in place, particularly due to the large number of asymptomatic cases observed. Robust contact tracing and social distancing measures are key to prevent future outbreaks.This study was funded by PHCC. The funders had no role in the design, analysis, interpretation, or writing. The first three authors had full access to all the data had final responsibility for the decision to submit for publication. Open Access funding provided by the Qatar National Librar