Christian Grov

CUNY Graduate School of Public Health and Health Policy · Community Health and Social Sciences

After a decade of implementation in the US, PrEP uptake remains underutilized by communities that would greatly benefit from it. Event-Driven (ED) PrEP is a potential avenue to increase uptake, however very little is known about its use in the US. We analyzed data derived from Together 5000, an internet-based U.S. national cohort of Sexual and Gend...

To end the HIV epidemic, there is need for targeted strategies to reduce HIV incidence for those most vulnerable, including an HIV vaccine. This study seeks to understand the perceptions that non-PrEP using gay and bisexual men and other men who have sex with men (GBMSM) have about a potential HIV vaccine, while contextualizing their perspectives w...

Our study assessed the association between methamphetamine (i.e., crystal meth, CM) use and awareness and interest in event-driven (ED) PrEP among HIV-negative and those with unknown serostatus cisgender males and transgender people. We performed log-binomial regression analysis to predict awareness (i.e., having heard of ED PrEP) and being interes...

It is crucial to understand factors associated with COVID-19 booster uptake in the U.S. given the updated COVID-19 vaccine recommendations. Using data from a national prospective cohort (N=4,616) between September 2021-October 2022, we examined socioeconomic, demographic, and behavioral factors of initial booster uptake among participants fully-vac...

INTRODUCTION Efforts to improve PrEP uptake among gay men, transgender women, and Black cisgender women are evident across the US, responding to epidemiologic data showing a disproportionate HIV burden in these communities. However, transgender men and other trans masculine people (TMSM)—those assigned female at birth who identify otherwise and hav...

Introduction Community‐based cohort studies of HIV seroconversion can identify important avenues for enhancing HIV prevention efforts in the era of pre‐exposure prophylaxis (PrEP). Within individuals, one can assess exposure and outcome variables repeatedly and with increased certainty regarding temporal ordering. This cohort study examined the ass...

Background PrEP uptake among Black and Latino gay, bisexual, and other men who have sex with men (GBM) remains low in the United States. The design and implementation of PrEP delivery programs that incorporate the preferences of Black and Latino GBM may overcome barriers to uptake. We aimed to identify preferences for PrEP care among high-priority...

Background: Youth, including those experiencing housing instability, are among the fastest growing groups of individuals with new STI diagnoses, including HIV. The unpredictable nature of the lives of youth experiencing housing instability often leads to inconsistent or non-existent health care and preventive follow up, leaving gaps in our knowled...

Our objective was to examine the influence of COVID-19 vaccination on recent (i.e., past month) moderate or severe symptoms of anxiety (GAD‐7≥10) or depression (PHQ‐8≥10) before and after the COVID-19 vaccine became universally available for adults in the U.S. Participants belonged to the Communities, Households, and SARS-CoV-2 Epidemiology Cohort...

Methamphetamine use is on the rise among sexual and gender minority people who have sex with men (SGMSM), escalating their HIV risk. Despite pre-exposure prophylaxis (PrEP) being an effective biomedical HIV prevention tool, its uptake in relation to methamphetamine use patterns in SGMSM has not been studied. In a U.S. cohort study from 2017 to 2022...

In the US, sexual and gender minority populations are disproportionately affected by HIV. Pre-exposure prophylaxis (PrEP) is a key prevention method, but its effectiveness relies on consistent usage. Our four-year national cohort study explored PrEP discontinuation among sexual and gender minority people who initiated PrEP. We found a high annual r...

Background The onset of the COVID-19 pandemic in the United States in March 2020 caused a dramatic change in the way many people lived. Few aspects of daily life were left undisrupted by the pandemic’s onset as well as the accompanying policies to control the spread of the disease. Previous research has found that the pandemic may have significantl...

Background In the summer of 2022, the United States faced a nationwide outbreak of mpox, with cases concentrated in sexual and gender minorities who have sex with men. Understanding rates of mpox vaccine uptake and concomitant behavioral change is essential to guide the implementation of targeted public health responses to the potential reemergence...

This study used repeat serologic testing to estimate infection rates and risk factors in two overlapping cohorts of SARS-CoV-2 N protein seronegative U.S. adults. One mostly unvaccinated sub-cohort was tracked from April 2020 to March 2021 (pre-vaccine/wild-type era, n = 3421), and the other, mostly vaccinated cohort, from March 2021 to June 2022 (...

Background We described the oral nirmatrelvir/ritonavir (NMV/r) and molnupiravir (MOV) uptake among the sub-group of highly vaccinated adults in a U.S. national prospective cohort who were infected with SARS-CoV-2 between 12/2021 and 10/2022. Methods We estimate antiviral uptake within 5 days of SARS-CoV-2 infection, as well as age- and gender- ad...

Background Infectious disease surveillance systems, which largely rely on diagnosed cases, underestimate the true incidence of SARS-CoV-2 infection, due to under-ascertainment and underreporting. We used repeat serologic testing to measure N-protein seroconversion in a well-characterized cohort of U.S. adults with no serologic evidence of SARS-CoV-...

For sexual minority men (SMM), attachment anxiety and attachment avoidance are evidenced to predict poor mental health (e.g., depression and anxiety). While mindfulness is known to mediate this relationship among the general population, it has yet to be examined among SMM. This study examined the interaction of attachment anxiety and avoidance, and...

Background: The HIV epidemic remains a major public health concern, particularly among youths living with HIV. While the availability of antiretroviral therapy has significantly improved the health outcomes of people living with HIV, there is growing evidence that youths living with HIV may be at increased risk of cardiovascular disease. However,...

Marginalized groups (including people of Color and sexual minorities) have been over-policed and specifically targeted based on their race/ethnicity and identity. The deleterious effects of over-policing marginalized groups include overrepresentation in the carceral system, experiencing higher rates of violence from police, and extend to affect men...

Objective: While much has been reported about the impact of the COVID-19 pandemic on food insecurity, longitudinal data and the variability experienced by people working in various industries are limited. This study aims to further characterize people experiencing food insecurity during the pandemic in terms of employment, sociodemographic charact...

The extant data suggest that LGBT communities were disproportionately impacted by the economic ramifications of the pandemic and were more likely to report being uninsured throughout the first two years of the pandemic. Additionally, these groups are at heightened vulnerability for several health conditions that require insurance to manage or preve...

BACKGROUND Although pre-exposure prophylaxis (PrEP) could substantially mitigate HIV risk, sexual minority men (SMM) who use stimulants commonly experience difficulties with engaging in PrEP clinical services. Motivational interviewing (MI) and contingency management (CM) reduce substance use and condomless anal sex in this population, but these mo...

Background Although pre-exposure prophylaxis (PrEP) could substantially mitigate HIV risk, sexual minority men who use stimulants commonly experience difficulties with engaging in PrEP clinical services. Motivational interviewing (MI) and contingency management (CM) reduce substance use and condomless anal sex (CAS) in this population, but these mo...

BACKGROUND Black cisgender gay, bisexual and other sexual minority men (SMM) and transgender women (TW) continue to be heavily impacted by HIV. Further research is needed to better understand HIV prevention and care outcomes among Black SMM and TW, including the impact of substance use and sleep health, as well as whether neighborhood and network f...

Background Pre-exposure prophylaxis (PrEP) is proven to prevent HIV infection. However, PrEP uptake to date has been limited and inequitable. Analyzing the readability of existing PrEP-related information is important to understand the potential impact of available PrEP information on PrEP uptake and identify opportunities to improve PrEP-related e...

BACKGROUND Pre-exposure prophylaxis (PrEP) is proven to prevent HIV infection. However, PrEP uptake to date has been limited and inequitable. Analyzing the readability of existing PrEP-related information is important to understand the potential impact of available PrEP information on PrEP uptake and identify opportunities to improve PrEP-related e...

Background Black cisgender gay, bisexual, and other sexual minority men (SMM) and transgender women (TW) continue to be heavily affected by HIV. Further research is needed to better understand HIV prevention and care outcomes in this population. In particular, there is a need for research examining the impact of substance use and sleep health on HI...

Background In the US, stimulant use is associated with a 3–6 times greater rate of HIV seroconversion in sexual minority men (SMM) than in those who do not use stimulants. Annually, 1 in 3 SMM who HIV seroconvert will be persistent methamphetamine (meth) users. The primary objective of this qualitative study was to explore experiences of stimulant...

Background Although pre-exposure prophylaxis (PrEP) could substantially mitigate HIV risk, sexual minority men (SMM) who use stimulants commonly experience difficulties with engaging in PrEP clinical services. Motivational interviewing (MI) and contingency management (CM) reduce substance use and condomless anal sex in this population, but these mo...

The early months of the SARS-CoV2 pandemic exacerbated health disparities for vulnerable populations, including transgender (trans) communities, creating unique challenges for navigating sex and dating. This paper aims to expand upon the current literature regarding transmasculine populations by capturing their lived experiences during this critica...

BACKGROUND The onset of the COVID-19 pandemic in the United States in March 2020 caused a dramatic change in the way many people lived. Few aspects of daily life were left undisrupted by the pandemic’s onset as well as the accompanying policies to control the spread of the disease. Previous research has found that the pandemic may have significantl...

Introduction: PrEP use cotinues lag estimated need among gay and bisexual men in the U.S. Studies report that challenges paying for PrEP may undermine continued use. Our study aimed to measure these challenges over time. Methods: Data were taken from a U.S. national cohort study of cisgender gay and bisexual men and transgender individuals aged...

Targeted work readiness training is an important approach to help people living with HIV (PLHIV) to overcome their unique barriers to work, while addressing social determinants of health needs. This study assesses the psychosocial impacts of a work readiness training and internship program among HIV peer workers in New York City. From 2014 through...

The chapter argues that a critical review of the research conducted from the social sciences and epidemiology fields on STI have constructed categories of “risk”, as well as developed insights into preventing stigma and disease. The discussion includes how public health discourses, health service delivery, and research have forged partnerships with...

Objectives The COVID pandemic has had widespread impacts on maternal mental health. This research aims to examine the relationship between psychosocial stressors and symptoms of depression and anxiety and the extent to which emotional support or resilient coping moderates the relationship between psychosocial stressors and maternal mental health du...

Background: Prior research has shown that men who have sex with men (MSM) who use drugs are at increased risk of sexually transmitted infections (STI) and Human Immunodeficiency Virus (HIV). Often, MSM who use drugs use multiple substances at once and research has indicated that certain substances are used in combination more frequently. As a vuln...

Objectives Our aim was to measure COVID-19 vaccine uptake among children aged 5-17 years old via parents participating in the CHASING COVID Cohort and identify sociodemographic factors associated with it. Methods In this longitudinal study, parents of school-aged children were asked about their own vaccination status and that of their children at...

Background: Passive case-based surveillance underestimates the true extent of active infections in the population due to undiagnosed and untested cases, the exclusion of probable cases diagnosed point-of-care rapid antigen tests, and/or the exclusive use of at-home rapid tests which are not reported as part of case-based surveillance. The extent i...

We examined racial/ethnic disparities for COVID-19 seroconversion and hospitalization within a prospective cohort (n = 6,740) in the United States enrolled in March 2020 and followed-up through October 2021. Potential SARS-CoV-2 exposure, susceptibility to COVID-19 complications, and access to healthcare varied by race/ethnicity. Hispanic and Black...

One-quarter of gay, bisexual, and other men who have sex with men (GBMSM) with diagnosed HIV are not engaged in HIV care. Between 2018 and 2019, 50 GBMSM completed qualitative interviews 3 months after receiving an HIV-positive result. Interviews explored barriers to and facilitators of engagement and retention in HIV testing and care. Thematic ana...

Objectives While much has been reported about the impact of COVID-19 on U.S. food insecurity, longitudinal data and the variability experienced by people working in different industries are limited. This study aims to further characterize individuals experiencing food insecurity during the pandemic in terms of employment and sociodemographic charac...

The COVID-19 pandemic has disproportionately affected HIV-positive cisgender men who have sex with men (MSM). Between May and June in 2020, we conducted one-on-one semi-structured qualitative interviews with 20 HIV-positive MSM aiming to describe their (dis)connection to social, sexual, and health networks during the COVID-19 pandemic. All particip...

Sexual and gender minority individuals who attend collective sex venues (CSVs; establishments where people can have sex in groups or the presence of others) are at elevated risk for HIV and STIs. On-site sexual health interventions have been attempted at CSVs, but attendees’ interest in receiving such services is under-investigated. This paper pres...

Purpose of Review Patterns of sexualized drug use, including stimulants (e.g., methamphetamine) and chemsex drugs, are key drivers of HIV incidence among sexual minority men (SMM). Although pre-exposure prophylaxis (PrEP) mitigates HIV risk, there is no consensus regarding the associations of substance use with the PrEP care continuum. Recent Find...

BACKGROUND The HIV epidemic remains a major public health concern, particularly among youths living with HIV. While the availability of antiretroviral therapy has significantly improved the health outcomes of people living with HIV, there is growing evidence that youths living with HIV may be at increased risk of cardiovascular disease. However, th...

Objective To investigate the role of children in the home and household crowding as risk factors for severe COVID-19 disease. Methods We used interview data from 6,831 U.S. adults screened for the Communities, Households and SARS/CoV-2 Epidemiology (CHASING) COVID Cohort Study in April 2020. Results In logistic regression models, the adjusted odd...

Although co-occurring methamphetamine (meth) use and HIV amplify the risk for neuropsychiatric comorbidities, the underlying neuroimmune mechanisms are not well characterized. We examined whether a detectable viral load and dysregulated metabolism of amino acid precursors for neurotransmitters predicted subsequent levels of sexual compulsivity and...

Introduction: The use of digital technology in HIV-related interventions and implementation strategies is increasing. Whether the use of technology is to directly improve patient outcomes (ie, part of the intervention) or as part of the strategy to implement interventions has important implications. In this article, we present 5 case studies of pr...

Although sexual minority men experience elevated rates of childhood sexual abuse (CSA) and equal or greater rates of intimate partner violence (IPV) victimization compared to heterosexual individuals, little research has examined mechanisms linking these forms of victimization in this high-need population. We examined general (i.e., emotion regulat...

HIV-outcome inequities remain prevalent in the U.S. Medical providers (MPs) are gatekeepers of PrEP, and understanding the dynamics of PrEP assessments is of major interest for public health. We analyzed data from Together 5000, an internet-based U.S. national cohort of sexual and gender minority (SGM) individuals aged 16-49 years and at risk for H...

Background Prospective cohort studies of SARS-CoV-2 incidence complement case-based surveillance and cross-sectional seroprevalence surveys. Methods We estimated the incidence of SARS-CoV-2 infection in a national cohort of 6,738 U.S. adults, enrolled March-August 2020. Using Poisson models, we examined the association of social distancing and a c...

Collective sex venues such as sex clubs are strategic sites to promote sexual health among sexual and gender minority individuals. We present qualitative findings from a multiple-method study on the acceptability of sexual-health services at collective sex venues in New York City (NYC) among attendees who identified as men, transgender, or gender n...

BACKGROUND Given the availability of rapid at-home tests for SARS-CoV-2, and the lack of mechanism in the United States for reporting rapid at-home results, standard surveillance underestimates the true extent of active infections in the population. OBJECTIVE The objective of this analysis was to identify the extent to which cases of SARS-CoV-2 ma...

Background and objective: Research related to anxiety among sexual minority men (SMM) typically focuses on risk factors. It has seldom examined factors that may be associated with lower levels of anxiety. This gap in the literature represents an opportunity to explore positive psychological factors that may be related to lower levels of anxiety am...

We examined the influence of racial/ethnic differences in socioeconomic position on COVID-19 seroconversion and hospitalization within a community-based prospective cohort enrolled in March 2020 and followed through October 2021 (N=6740). The ability to social distance as a measure of exposure to COVID-19, susceptibility to COVID-19 complications,...

We estimated the trends and correlates of vaccine hesitancy, and its association with subsequent vaccine uptake among 5,458 adults in the United States. Participants belonged to the CHASING COVID Cohort, a national longitudinal study. Trends and correlates of vaccine hesitancy were examined longitudinally in eight interview rounds from October 2020...

This study examines parental intention to vaccinate children against COVID-19 and related sociodemographic factors in a national sample of US parents.

Since the onset of the COVID-19 pandemic, global research has suggested that the pandemic has negatively affected lesbian, gay, bisexual, transgender, and queer or questioning (LGBTQ) populations, including by limiting health care access. There is little research on the impact of COVID-19 among transmasculine persons and men assigned female sex at...

Emerging evidence suggests that sex workers face unique and profound risks arising from the COVID-19 pandemic. To illuminate the pandemic's effects on sex worker health and safety and identify intervention opportunities, from May–August 2018 in-depth interviews were conducted with a purposive sample of 15 sex workers, four service providers and two...

Introduction This cross-sectional study examined the associations of demographic, structural and psychological factors with distinct typologies of polysubstance use in sexual minority men (SMM) living with HIV who use methamphetamine. Methods In total, 161 SMM living with HIV who reported methamphetamine use in the past 3 months were recruited in...

Receptive anal sex is the primary means through which HIV is transmitted among men who have sex with men (MSM). Recently, researchers have begun investigating the role that rectal douching may play in amplifying risk for transmission. Yet, there is limited research on the frequency with which MSM douche, the products they use, and how this may vary...

Purpose The Communities, Households and SARS-CoV-2 Epidemiology (CHASING) COVID Cohort Study is a community-based prospective cohort study launched during the upswing of the USA COVID-19 epidemic. The objectives of the cohort study are to: (1) estimate and evaluate determinants of the incidence of SARS-CoV-2 infection, disease and deaths; (2) asses...

Sexual minority men (SMM) are at increased risk for mental health problems due to effects of sexual minority stigma (e.g., internalized homonegativity (IH)). Both IH and emotion dysregulation are contributors to sexual compulsivity; however, the role of feelings of sexual shame have not been examined in this association. A sample of 982 HIV-negativ...

Background: Inadequate screening and diagnostic testing in the United States throughout the first several months of the COVID-19 pandemic led to undetected cases transmitting disease in the community and an underestimation of cases. Though testing supply has increased, maintaining testing uptake remains a major public health priority in efforts to...

BACKGROUND Inadequate screening and diagnostic testing in the United States throughout the first several months of the COVID-19 pandemic led to undetected cases transmitting disease in the community and an underestimation of cases. Though testing supply has increased, maintaining testing uptake remains a public health priority in the efforts to con...

Safety differences between tenofovir alafenamide/emtricitabine (TAF) and tenofovir disoproxil fumarate/emtricitabine (TDF/FTC)-formulated pre-exposure prophylaxis (PrEP) appear to have little clinical significance for most PrEP users. Furthermore, generic TDF-formulated PrEP is projected to decrease the price of PrEP. Thus, efforts to shift PrEP us...

In 2012, the U.S. FDA approved the first drug for use as HIV Pre-Exposure Prophylaxis (PrEP), which is nearly 99% effective when taken as prescribed. Although the manifest function of PrEP is to prevent HIV infection in the event of exposure, the drug has also had a significant impact on various facets of sexuality. In this review, we focus on rese...

Introduction Prescription stimulants and methamphetamine have similarities in chemical structure and impact on biological functioning. However, there is limited literature on prescription stimulant misuse among sexual and gender minorities as well as how prescription misuse may impact later methamphetamine use. Methods We used data collected from...

Background Vaccine hesitancy in the U.S. may limit the potential to alleviate the public health threat caused by the COVID-19 pandemic. Methods We estimated trends in and correlates of vaccine hesitancy, and its association with subsequent vaccine uptake among 5,085 United States adults from the CHASING COVID Cohort study, a national longitudinal s...

The COVID-19 pandemic has brought renewed attention to the topic of challenging drug patents in the interest of public health. Pharmaceutical companies have already begun to patent existing medicines for the treatment and prevention of SARS-CoV-2, affording them exclusive manufacturing rights over vital medicines. Advocates have raised concerns reg...

Collective sex venues (places where people have sex in groups or in the presence of others, such as bathhouses or sex clubs) are locations where SARS-CoV-2 transmission is likely to occur. We conducted an online survey to examine the impact of the COVID-19 pandemic among 342 sexual and gender minority (SGM) individuals who had attended collective s...

There has been an influx of ads on social media seeking plaintiffs in lawsuits for harms/side-effects caused by tenofovir disoproxil fumarate/Emtricitabine (TDF/FTC, Truvada) for PrEP. Community groups and researchers have suggested these ads may be undermining efforts to disseminate PrEP to key populations. In October 2019, we began assessing the...

There is an urgent need to increase uptake and persistence in HIV pre-exposure prophylaxis (PrEP) in PrEP-eligible candidates. Little is known about the similarities and differences between groups of PrEP-naïve and former users, an important consideration for future interventions. We explored factors associated with being PrEP-naïve in a U.S. natio...

Background During Fall 2020 in the United States (U.S.), despite high COVID-19 case numbers and recommendations from public health officials not to travel and gather with individuals outside one’s household, millions of people gathered for Thanksgiving. The objective of this study was to understand if individuals’ behaviors and risk perceptions inf...

Pre-exposure prophylaxis (PrEP) has revolutionized HIV prevention efforts by effectively preventing the sexual transmission of HIV infection. Few studies have examined PrEP uptake and discontinuation among transgender individuals who are underserved in HIV prevention efforts. An online U.S. nationwide survey screened 294 HIV-negative transgender pe...