New insights into the paradox between smoking and the risk of SARS-CoV-2 infection (COVID-19): Insufficient evidence for a causal association.

Aims: Previous studies have reported a 'smoker's paradox', where people who smoke appear to be protected against Severe Acute Respiratory Syndrome CoronaVirus-2 (SARS-CoV-2) infection (COVID-19). This conflicts with well-established evidence that people who smoke are generally more vulnerable to respiratory infections. In this study, we aimed to validate the association between smoking and SARS-CoV-2 infection in a general Dutch population, and to evaluate the evidence underlying the possible causal relationship between smoking and SARS-CoV-2 infection by applying a modern adaptation of the Bradford Hill criteria.

Risk of death due to COVID-19 among current and former smokers in the Netherlands: a population-based quasi-cohort study.

Background: Research on smoking as a risk factor for death due to COVID-19 remains inconclusive, with different studies demonstrating either an increased or decreased risk of COVID-19 death among smokers. To investigate this controversy, this study uses data from the Netherlands to assess the relationship between smoking and death due to COVID-19.

Methods: In this population-based quasi-cohort study, we linked pseudonymized individual data on smoking status from the 2016 and 2020 'Health Monitor Adults and Elderly' in the Netherlands (n = 914 494) to data from the cause-of-death registry (n = 2962).

Incarceration history is associated with HIV infection among community-recruited people who inject drugs in Europe: A propensity-score matched analysis of cross-sectional studies.

Aims: We measured the association between a history of incarceration and HIV positivity among people who inject drugs (PWID) across Europe.

Design, Setting And Participants: This was a cross-sectional, multi-site, multi-year propensity-score matched analysis conducted in Europe. Participants comprised community-recruited PWID who reported a recent injection (within the last 12 months).

[Chemsex: health risks and the gap between healthcare needs and services among MSM].

Chemsex refers to the use of drugs, including ecstasy, GHB, cocaine and methamphetamine, by Males who have Sex with Males (MSM) and transgenders with the specific intention to perform sexual activities due to the drugs' facilitating influence on sexual performance and experience. Chemsex is predominantly situated in a private setting. Multiple routes of drug administration are applied, including 'slamming' and 'bootybumping'.

Social media use as a risk factor for depressive symptoms during pregnancy.

Background: Accumulating research has shown associations between excessive social media use (SMU) with depressive symptoms. Depression is common during pregnancy, but it is not known whether SMU plays a role in the etiology and clinical course of depressive symptoms during pregnancy.

Methods: The current study is a prospective cohort study with Dutch-speaking pregnant women recruited at the first antenatal appointment (N = 697).