The bidirectional relationship between pain and tobacco use: Insights from the longitudinal Population Assessment of Tobacco and Health (PATH) study.

Background: Tobacco smoking remains the leading preventable cause of death, whereas chronic pain is the leading cause of disability. Chronic pain and tobacco smoking are closely interrelated. We investigated whether pain predicts daily cigarette smoking and if daily cigarette smoking predicts the development of pain.

Evaluation of care for people with HIV in Primary Health Care: construct validation.

Objectives: to verify the construct validation of an instrument for evaluating care for people living with HIV in Primary Health Care.

Methods: methodological study carried out in 2021 with 260 health professionals in Recife, PE. Validation based on the internal structure was carried out at this stage using exploratory and confirmatory factor analysis, and validity based on item response theory.

Resistance to complement-mediated lysis of parainfluenza virus 5-infected cells is acquired after transition from acute to persistent infection.

Unlabelled: Persistent viral infections can be an important medical problem, with persistently infected (PI) cells extending viral shedding, maintaining inflammation, and providing potential sources for new viral variants. Given that PI cells can acquire resistance to some innate immune pathways, we tested the hypothesis that complement (C')-mediated lysis of parainfluenza virus 5 (PIV5)-infected cells would differ between acute-infected and PI cells. Biochemical and real-time cell viability assays showed effective C'-mediated lysis of A549 lung cells acutely infected with PIV5, through pathways that depended on C3 and C5, but largely independent of C6.