Domestic violence is a serious problem in the United States, with almost two million incidents occurring every year. Although several risk factors have been identified, psychopathy has been understudied in this area. The current study investigated the association between psychopathy and successful treatment completion and reoffending in 483 convicted male batterers undergoing treatment. Findings showed that both overall psychopathy and the specific facet of impulsive antisociality were positively associated with treatment failure and recidivism at 1-year follow-up. Furthermore, results also indicated that the psychopathy facet of fearless dominance positively moderated the association between impulsive antisociality and treatment failure. Thus, individuals high on fearless dominance are bold and narcissistic, and reject the notion that they need treatment, and when coupled with impulsive antisociality, this combination of traits increases the likelihood of treatment failure. In addition, relative risk-ratio analyses indicated that individuals with elevated scores on global psychopathy and impulsive antisociality were at a greater risk for treatment failure and recidivism.

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The concentration of SARS‐CoV‐2‐specific serum antibodies, elicited by vaccination or infection, is a primary determinant of anti‐viral immunity, which correlates with protection against infection and COVID‐19. Serum samples were obtained from 25 897 participants and assayed for anti‐SARS‐CoV‐2 spike protein RBD IgG antibodies. The cohort was composed of newly vaccinated BNT162b2 recipients, in the first month or 6 months after vaccination, COVID‐19 patients and a general sample of the Israeli population. Antibody levels of BNT162b2 vaccine recipients were negatively correlated with age, with a prominent decrease in recipients over 55 years old, which was most significant in males. This trend was observable within the first month and 6 months after vaccination, while younger participants were more likely to maintain stable levels of serum antibodies. The antibody concentration of participants previously infected with SARS‐CoV‐2 was lower than the vaccinated and had a more complex, non‐linear relation to age, sex and COVID‐19 symptoms. Taken together, our data supports age and sex as primary determining factors for both the magnitude and durability of humoral response to SARS‐CoV‐2 infection and the COVID‐19 vaccine. Our results could inform vaccination policies, prioritizing the most susceptible populations for repeated vaccination.