Willi Mcfarland, MD, PhD, MPH
Professor
Publications
- Non-B variants of HIV-1 in San Francisco, California.
- Unsafe Injection Is Associated with Higher HIV Testing after Bayesian Adjustment for Unmeasured Confounding.
- Syphilis Testing Among Female Prisoners in Brazil: Results of a National Cross-sectional Survey.
- Rates and Correlates of HIV Incidence in Namibia's Zambezi Region From 2014 to 2016: Sentinel, Community-Based Cohort Study.
- HIV Prevalence, Risk Factors for Infection, and Uptake of Prevention, Testing, and Treatment among Female Sex Workers in Namibia.
- Prevalence and disparities in opioid overdose response training among people who inject drugs, San Francisco: Naloxone training among injectors in San Francisco.
- Stigma, discrimination, violence, and HIV testing among men who have sex with men in four major cities in Ghana.
- High HIV incidence among young and racial/ethnic minority transgender women in San Francisco: results of a longitudinal cohort study.
- Low PrEP Awareness and Use Among People Who Inject Drugs, San Francisco, 2018.
- LIFETIME SYPHILIS PREVALENCE AND ASSOCIATED RISK FACTORS AMONG FEMALE PRISONERS IN BRAZIL.
- Will We Get to Zero HIV Stigma in San Francisco?
- How are transgender women acquiring HIV? Insights from phylogenetic transmission clusters in San Francisco.
- Community Levels of PrEP Use Among Men Who Have Sex with Men by Race/Ethnicity, San Francisco, 2017.
- Increases in Pre-exposure Prophylaxis Use and Decreases in Condom Use: Behavioral Patterns Among HIV-Negative San Francisco Men Who have Sex with Men, 2004-2017.
- Estimated Population Size of Men Who Have Sex with Men, San Francisco, 2017.
- Undiagnosed and Untreated HIV Infection Among Persons Who Inject Drugs: Results of Three National HIV Behavioral Surveillance Surveys, San Francisco, 2009-2015.
- Prevalence of syphilis and related risk behaviors among women in five distinct indigenous populations in Paraguay.
- Hepatitis C seroprevalence and engagement in related care and treatment among trans women.
- Estimating the Population Size of Female Sex Workers in Namibia Using a Respondent-Driven Sampling Adjustment to the Reverse Tracking Method: A Novel Approach.
- High and Stable Human Immunodeficiency Virus Prevalence Among Transwomen With Low Income Recruited With Respondent-driven Sampling, San Francisco, 2010-2016.
- A Bayesian approach to synthesize estimates of the size of hidden populations: the Anchored Multiplier.
- Prevalence and correlates of hazardous alcohol consumption and binge drinking among men who have sex with men (MSM) in San Francisco.
- Age at Sexual Initiation and Sexual and Health Risk Behaviors Among Jamaican Adolescents and Young Adults.
- HIV Risk and Gender in Jamaica's Homeless Population.
- Syringe Sharing in Drug Injecting Dyads: A Cross-Classified Multilevel Analysis of Social Networks.
- Whose Responsibility Is It? Beliefs About Preventing HIV Transmission Among Men Who Have Sex With Men.
- Hepatitis B Vaccination and Infection Prevalence Among Men Who Have Sex With Men Who Travel Internationally.
- How Many Transgender Men Are There in San Francisco?
- HIV Prevalence, Sexual Partners, Sexual Behavior and HIV Acquisition Risk Among Trans Men, San Francisco, 2014.
- Distribution of Behavioral Patterns Before Infection Among San Francisco Men Who Have Sex With Men Newly Infected With HIV in 2014.
- What Factors Are Associated With Receiving a Recommendation to Get Tested for HIV by Health Care Providers Among Men Who Have Sex With Men?
- HIV Treatment and Re-infection Beliefs Predict Sexual Risk Behavior of Men Who Have Sex With Men.
- High Mobility and HIV Prevalence Among Female Market Traders in East Africa in 2014.
- Estimated Number of People Who Inject Drugs in San Francisco, 2005, 2009, and 2012.
- Pre-exposure Prophylaxis (PrEP) Use, Seroadaptation, and Sexual Behavior Among Men Who Have Sex with Men, San Francisco, 2004-2014.
- San Franciscan MSM have similar types and numbers of partnerships with men inside San Francisco and outside San Francisco, 2011.
- The Impact of Discrimination on the Mental Health of Trans*Female Youth and the Protective Effect of Parental Support.
- Testosterone and sexual risk among transmen: a mixed methods exploratory study.
- HIV Serodisclosure and Sexual Behavior During International Travel.
- Prevalence and characteristics of users of pre-exposure prophylaxis (PrEP) among men who have sex with men, San Francisco, 2014 in a cross-sectional survey: implications for disparities.
- Using expert opinion to quantify unmeasured confounding bias parameters.
- HIV Community Viral Load and Factors Associated With Elevated Viremia Among a Community-Based Sample of Men Who Have Sex With Men in Vancouver, Canada.
- The importance of assessing self-reported HIV status in bio-behavioural surveys.
- HIV Testing and Awareness of Partner's HIV Status Among Chinese Men Who Have Sex with Men in Main Partnerships.
- Examining progress toward the UNAIDS 90-90-90 framework among men who have sex with men, San Francisco, 2014.
- Estimating Incidence of HIV Infection Among Men Who Have Sex with Men, San Francisco, 2004–2014.
- If You Are Not Counted, You Don't Count: Estimating the Number of African-American Men Who Have Sex with Men in San Francisco Using a Novel Bayesian Approach.
- Trends in sources and sharing of needles among people who inject drugs, San Francisco, 2005-2012.
- Brief Report: Recent Infection, Sexually Transmitted Infections, and Transmission Clusters Frequently Observed Among Persons Newly Diagnosed With HIV in San Francisco.
- Measuring self-reported HIV status in bio-behavioural surveys.
- Differential HIV risk for racial/ethnic minority trans*female youths and socioeconomic disparities in housing, residential stability, and education.
- Critique and lessons learned from using multiple methods to estimate population size of men who have sex with men in Ghana.
- Prevalence and correlates of substance use among trans female youth ages 16-24 years in the San Francisco Bay Area.
- Gay and bisexual men engage in fewer risky sexual behaviors while traveling internationally: a cross-sectional study in San Francisco.
- Who are the sexual partners of transgender individuals? Differences in demographic characteristics and risk behaviours of San Francisco HIV testing clients with transgender sexual partners compared with overall testers.
- Long-chain peer referral to recruit black MSM and black transgender women for an HIV vaccine efficacy trial.
- Prevalence, correlates and trends in seroadaptive behaviours among men who have sex with men from serial cross-sectional surveillance in San Francisco, 2004-2011.
- HIV prevention services and testing utilization behaviors among men who have sex with men at elevated risk for HIV in Chongqing, China.
- HCV, HBV, and HIV seroprevalence, coinfections, and related behaviors among male injection drug users in Arak, Iran.
- HIV and related risk behaviors among female sex workers in Iran: bias-adjusted estimates from the 2010 National Bio-Behavoral Survey.
- How can we improve online HIV and STD prevention for men who have sex with men? Perspectives of hook-up website owners, website users, and HIV/STD directors.
- Insight into Jordanian thinking about HIV: knowledge of Jordanian men and women about HIV prevention.
- Risk behaviors for HIV in sexual partnerships of San Francisco injection drug users.
- Comparison of HIV behavioral indicators among men who have sex with men across two survey methodologies, San Francisco, 2004 and 2008.
- Balancing theory and practice in respondent-driven sampling: a case study of innovations developed to overcome recruitment challenges.
- High burden of hepatitis B infection in Northern Uganda: results of a population-based survey.
- Hepatitis E virus infection in patients infected with human immunodeficiency virus in an endemic area in Iran.
- Measuring the unknown: calculating community viral load among HIV-infected MSM unaware of their HIV status in San Francisco from National HIV Behavioral Surveillance, 2004-2011.
- Convergence of HIV prevalence and inter-racial sexual mixing among men who have sex with men, San Francisco, 2004-2011.
- Prevalence and predictors of conscious risk behavior among San Franciscan men who have sex with men.
- Estimating population size, HIV prevalence and HIV incidence among men who have sex with men: a case example of synthesising multiple empirical data sources and methods in San Francisco.
- A new trend in the HIV epidemic among men who have sex with men, San Francisco, 2004-2011.
- Incorporating the service multiplier method in respondent-driven sampling surveys to estimate the size of hidden and hard-to-reach populations: case studies from around the world.
- Predictors of HIV testing among men who have sex with men in a large Chinese city.
- HIV voluntary counseling and testing at an abortion clinic: missed opportunities for diagnosis.
- Hepatitis C infection among men who have sex with men, San Francisco, 2011.
- Predictors of serosorting and intention to serosort among men who have sex with men, San Francisco.
- Participation of HIV prevention programs among men who have sex with men in two cities of China--a mixed method study.
- Behavior, intention or chance? A longitudinal study of HIV seroadaptive behaviors, abstinence and condom use.
- Evaluation of a peer network-based sexual risk reduction intervention for men in beer halls in Zimbabwe: results from a randomized controlled trial.
- Sentinel surveillance of HIV-1 transmitted drug resistance, acute infection and recent infection.
- Beyond sugar daddies: intergenerational sex and AIDS in urban Zimbabwe.
- Prevalence and correlates of herpes simplex virus type-2 infection among men who have sex with men, san francisco, 2008.
- Do rates of unprotected anal intercourse among HIV-positive MSM present a risk for hepatitis C transmission?
- Adolescent experiences of discrimination, harassment, connectedness to community and comfort with sexual orientation reported by adult men who have sex with men as a predictor of adult HIV status.
- Transmen in San Francisco: what do we know from HIV test site data?
- What is the potential impact of adult circumcision on the HIV epidemic among men who have sex with men in San Francisco?
- Accessing a diverse sample of injection drug users in San Francisco through respondent-driven sampling.
- HIV seroadaptation among individuals, within sexual dyads, and by sexual episodes, men who have sex with men, San Francisco, 2008.
- Hepatitis C prevalence among HIV-positive MSM in San Francisco: 2004 and 2008.
- Socioeconomic position and HIV risk-relevant behavior among lower-income heterosexuals in San Francisco.
- Behavioral surveillance of heterosexual exchange-sex partnerships in San Francisco: context, predictors and implications.
- Racial/Ethnic differences in seroadaptive and serodisclosure behaviors among men who have sex with men.
- Seroadaptive behaviours among men who have sex with men in San Francisco: the situation in 2008.
- Comparing respondent-driven sampling and targeted sampling methods of recruiting injection drug users in San Francisco.
- Prevalence and correlates of co-infection with human immunodeficiency virus and hepatitis C virus in male injection drug users in Iran.
- Decreases in community viral load are accompanied by reductions in new HIV infections in San Francisco.
- High prevalence of chronic hepatitis B infection among injection drug users in Iran: the need to increase vaccination of adults at risk.
- Prevalence and correlates of hepatitis C infection among male injection drug users in detention, Tehran, Iran.
- Recent HIV-1 infection detection: comparison of incidence estimates derived by laboratory assays and repeat testing data.
- Racial mixing and HIV risk among men who have sex with men.
- HIV risk behaviors in heterosexual partnerships: female knowledge and male behavior.
- An examination of the rates of receptive anal intercourse among Asian/Pacific Islander men who have sex with men in San Francisco.
- Hepatitis B sero-prevalence and risk behaviors among immigrant men in a population-based household survey in low-income neighborhoods of northern California.
- Estimation of HIV incidence in San Francisco.
- Comparing internet-based and venue-based methods to sample MSM in the San Francisco Bay Area.
- Frequent international travel by men who have sex with men recently diagnosed with HIV-1: potential for transmission of primary HIV-1 drug resistance.
- Locating unrecognized HIV infections among men who have sex with men: San Francisco and Los Angeles.
- Use of sentinel surveillance and geographic information systems to monitor trends in HIV prevalence, incidence, and related risk behavior among women undergoing syphilis screening in a jail setting.
- Sexual compulsiveness and change in unprotected anal intercourse: unexpected results from a randomized controlled HIV counseling intervention study.
- An empirical comparison of respondent-driven sampling, time location sampling, and snowball sampling for behavioral surveillance in men who have sex with men, Fortaleza, Brazil.
- Increasing HIV prevalence among drug users in western Guangdong province, China, 1995-2005.
- The Internet, HIV serosorting and transmission risk among men who have sex with men, San Francisco.
- HIV prevalence and correlates of unprotected anal intercourse among men who have sex with men, Jinan, China.
- Trends in prevalence of HIV, syphilis, hepatitis C, hepatitis B, and sexual risk behavior among men who have sex with men. Results of 3 consecutive respondent-driven sampling surveys in Beijing, 2004 through 2006.
- Trends in sexually transmitted diseases, sexual risk behavior, and HIV infection among Asian/Pacific Islander men who have sex with men, San Francisco, 1999-2005.
- Prevalence of HIV infection and predictors of high-transmission sexual risk behaviors among men who have sex with men.
- Brief cognitive counseling with HIV testing to reduce sexual risk among men who have sex with men: results from a randomized controlled trial using paraprofessional counselors.
- Indicators of use of methamphetamine and other substances among men who have sex with men, San Francisco, 2003-2006.
- Routine surveillance for the detection of acute and recent HIV infections and transmission of antiretroviral resistance.
- Assessing the feasibility of harm reduction services for MSM: the late night breakfast buffet study.
- A population-based study on alcohol and high-risk sexual behaviors in Botswana.
- Contraceptive intentions among adolescents after abortion.
- Elevated risk of death for African Americans with AIDS, San Francisco, 1996-2002.
- How well do trends in HIV prevalence in young people reflect HIV incidence? Results from 10 years of HIV serosurveillance in San Francisco.
- Associations between substance use and sexual risk among very young men who have sex with men.
- Prevalence and correlates of substance use among young Asian Pacific Islander men who have sex with men.
- HIV testing patterns and unrecognized HIV infection among young Asian and Pacific Islander men who have sex with men in San Francisco.
- Amphetamine use is associated with increased HIV incidence among men who have sex with men in San Francisco.
- HIV sentinel surveillance among women seeking elective pregnancy termination, San Francisco.
- Comparison of three methods to measure HIV incidence among persons seeking voluntary, anonymous counseling and testing.
- Acceptability of adult male circumcision for sexually transmitted disease and HIV prevention in Zimbabwe.
- High level of hepatitis B infection and ongoing risk among Asian/Pacific Islander men who have sex with men, San Francisco, 2000-2001.
- HIV seroconversion among the homeless and marginally housed in San Francisco: a ten-year study.
- Persistent HIV incidence among injection drug users in San Francisco during the 1990s: results of five studies.
- Trends in HIV prevalence among public sexually transmitted disease clinic attendees in the Western region of the United States (1989-1999).
- An opportunity for prevention: prevalence, incidence, and sexual risk for HIV among young Asian and Pacific Islander men who have sex with men, San Francisco.
- The bisexual bridge revisited: sexual risk behavior among men who have sex with men and women, San Francisco, 1998-2003.
- HIV prevention fatigue among high-risk populations in San Francisco.
- Gay Asian men in San Francisco follow the international trend: increases in rates of unprotected anal intercourse and sexually transmitted diseases, 1999-2002.
- Low incidence and prevalence of hepatitis C virus infection among sexually active non-intravenous drug-using adults, San Francisco, 1997-2000.
- Provision of syndromic treatment of sexually transmitted infections by community pharmacists: a potentially underutilized HIV prevention strategy.
- Unprotected anal intercourse between potentially HIV-serodiscordant men who have sex with men, San Francisco.
- Viagra use in a community-recruited sample of men who have sex with men, San Francisco.
- Low socioeconomic status is associated with a higher rate of death in the era of highly active antiretroviral therapy, San Francisco.
- Incidence and prevalence of herpes simplex virus type 2 infection in persons seeking repeat HIV counseling and testing.
- Self-reported sexual identity, sexual behaviors and health risks.
- Risk of HIV infection attributable to oral sex among men who have sex with men and in the population of men who have sex with men.
- Characterization of sexually transmitted disease clinic patients with recent human immunodeficiency virus infection.
- Continuing increases in sexual risk behavior and sexually transmitted diseases among men who have sex with men: San Francisco, Calif, 1999-2001, USA.
- Changing sexual behavior among gay male repeat testers for HIV: a randomized, controlled trial of a single-session intervention.
- Hepatitis C virus infection in young, low-income women: the role of sexually transmitted infection as a potential cofactor for HCV infection.