Browsing by Author "Allison Aiello"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    A prospective study of asymptomatic SARS-CoV-2 infection among individuals involved in academic research under limited operations during the COVID-19 pandemic
    (2022-04-25) Audrey Pettifor; Bethany L DiPrete; Bonnie E Shook-Sa; Lakshmanane Premkumar; Kriste Kuczynski; Dirk Dittmer; Allison Aiello; Shannon Wallet; Robert Maile; Joyce Tan; Ramesh Jadi; Linda Pluta; Aravinda M de Silva; David J Weber; Min Kim; Arlene C Seña; Corbin D Jones
    Background: Early in the pandemic, transmission risk from asymptomatic infection was unclear, making it imperative to monitor infection in workplace settings. Further, data on SARS-CoV-2 seroprevalence within university populations has been limited. Methods: We performed a longitudinal study of University research employees on campus July-December 2020. We conducted questionnaires on COVID-19 risk factors, RT-PCR testing, and SARS-CoV-2 serology using an in-house spike RBD assay, laboratory-based Spike NTD assay, and standard nucleocapsid platform assay. We estimated prevalence and cumulative incidence of seroconversion with 95% confidence intervals using the inverse of the Kaplan-Meier estimator. Results: 910 individuals were included in this analysis. At baseline, 6.2% (95% CI 4.29-8.19) were seropositive using the spike RBD assay; four (0.4%) were seropositive using the nucleocapsid assay, and 44 (4.8%) using the Spike NTD assay. Cumulative incidence was 3.61% (95% CI: 2.04-5.16). Six asymptomatic individuals had positive RT-PCR results. Conclusions: Prevalence and incidence of SARS-CoV-2 infections were low; however, differences in target antigens of serological tests provided different estimates. Future research on appropriate methods of serological testing in unvaccinated and vaccinated populations is needed. Frequent RT-PCR testing of asymptomatic individuals is required to detect acute infections, and repeated serosurveys are beneficial for monitoring subclinical infection.
  • Thumbnail Image
    Item
    Effect of quality of caregiver-adolescent relationship on sexual debut, transactional sex and on age-disparate relationships among young women in rural South Africa enrolled in HPTN 068
    (2022-04-01) Nosipho Shangase; Jess Edwards; Brian Pence; Allison Aiello; Andrea Hussong; Xavier Gómez-Olivé; Kathleen Kahn; Marie Stoner; Audrey Pettifor
    Background: Adolescent girls and young women (AGYW) remain burdened by the HIV epidemic. Positive caregiver-child relationships are associated with safe sexual behaviors in young people; yet, this literature often highlights the role of parent-child communication and parental monitoring, neglecting the importance of emotional relationships between a caregiver and adolescent. Setting: We used longitudinal data from HIV Prevention Trial Network 068-conducted among 2533 AGYW (13-20 years) over a period of 5 years in Agincourt, South Africa. Method: Kaplan-Meier and Cox models were used to estimate the effect of quality of caregiver-adolescent relationships (caring and closeness) on sexual debut, and log-binomial models with generalized estimating equations were used to examine the relationship between our exposures and transactional sex and age-disparate relationships. Results: Sexual debut was delayed among those who reported high levels of caregiver caring [hazard ratio: 0.80, 95% confidence interval (CI): 0.69 to 0.93] and caregiver closeness (hazard ratio: 0.80, 95% CI: 0.68 to 0.95). AGYW who reported high quality caregiver-adolescent relationships had a lower risk of transactional sex [caring: risk ratio (RR): 0.67, 95% CI: 0.58 to 0.78; closeness: RR: 0.58; 95% CI: 0.50 to 0.67]. Similarly, those with high-quality caregiver-adolescent relationships were less likely to be in an age-disparate relationship (caring: RR: 0.68, 95% CI: 0.58 to 0.79; closeness: RR: 0.77, 95% CI: 0.66 to 0.90). Conclusions: Findings indicate high-quality caregiver-adolescent relationships are associated with delayed sexual debut, a lower risk of transactional sex, and having an older partner. Family-centered interventions are needed to improve relationships between AGYW and caregivers.