"Smoker" and "Vaper" identity in people who use both cigarettes and E-cigarettes: Changes over time and associations with smoking behaviors.

Background: Individuals who use both cigarettes and e-cigarettes may have multiple nicotine product use self-identities, each of which may be associated with patterns of use, including cessation.

Objectives: This study examined changes in "smoker" and "vaper" identities and product use behaviors over one year among adults who used both cigarettes and e-cigarettes. We hypothesized that stronger baseline vaping identities would be associated with higher odds of smoking cessation, and stronger baseline smoking identities would be associated with continued cigarette use.

Disentangling the rhythms of human activity in the built environment for airborne transmission risk: An analysis of large-scale mobility data.

Background: Since the outset of the COVID-19 pandemic, substantial public attention has focused on the role of seasonality in impacting transmission. Misconceptions have relied on seasonal mediation of respiratory diseases driven solely by environmental variables. However, seasonality is expected to be driven by host social behavior, particularly in highly susceptible populations.

The global landscape of smallpox vaccination history and implications for current and future orthopoxvirus susceptibility: a modelling study.

Background: More than four decades after the eradication of smallpox, the ongoing 2022 monkeypox outbreak and increasing transmission events of other orthopoxviruses necessitate a greater understanding of the global distribution of susceptibility to orthopoxviruses. We aimed to characterise the current global landscape of smallpox vaccination history and orthopoxvirus susceptibility.

Methods: We characterised the global landscape of smallpox vaccination at a subnational scale by integrating data on current demography with historical smallpox vaccination programme features (coverage and cessation dates) from eradication documents and published literature.

Preferred flavors and tobacco use patterns in adult dual users of cigarettes and ENDS.

Objectives: This study examined how adult dual users of cigarettes and electronic nicotine delivery system (ENDS) flavor preference varied by demographics, tobacco history, motives, and expectancies for ENDS, and how ENDS flavor preference was associated with changes in cigarette and ENDS use over 12 months.

Methods: Data come from the baseline and 12-month waves of an observational study of adult dual cigarette and ENDS users (N = 406). Flavor preferences were grouped into 4 categories: tobacco (12.