
Professor
M_Epidemiology & Biostatistics
+1 415 476-5781
My research interests are the epidemiology and prevention of infectious and tropical diseases of public health importance, both internationally and domestically, with a primary focus on HIV and AIDS. My work is funded primarily by the Centers for Disease Control and Prevention through the Presidential Emergency Plan for AIDS Relief. I also have smaller projects dealing with the epidemiology of tuberculosis in California, the prevention of childhood injury, immunizations and bioterrorism. I am a member of the AIDS Research Institute's Executive Committee.
Publications
Programmatic Implications of National Recent HIV Infection Surveillance in Cambodia.
The Journal of antimicrobial chemotherapy
The epidemiology of HIV population viral load in twelve sub-Saharan African countries.
Research Square
Identifying pauci-/asymptomatic and unrecognized Ebola virus disease among close contacts based on exposure risk assessments and screening algorithms.
The Journal of antimicrobial chemotherapy
Incidence and prevalence of COVID-19 within a healthcare worker cohort during the first year of the SARS-CoV-2 pandemic.
The American journal of tropical medicine and hygiene
Magnitude and determinants of SARS-CoV-2 household transmission: a longitudinal cohort study.
The American journal of tropical medicine and hygiene
All-cause and cause-specific mortality rates for Kisumu County: a comparison with Kenya, low-and middle-income countries.
PLOS global public health
Unusual Interseasonal RSV Activity in the Southern and Northern Hemispheres.
The Journal of antimicrobial chemotherapy
Interventions to reengage people living with HIV who are lost to follow-up from HIV treatment programs: A systematic review and meta-analysis.
M_MED-ZSFG-AIDS
Safe reopening of college campuses during COVID-19: The University of California experience in Fall 2020.
Research Square
Migration in Namibia and its association with HIV acquisition and treatment outcomes.
Research Square
Clarification regarding Outdoor Transmission of SARS-CoV-2 and Other Respiratory Viruses, a Systematic Review.
The Journal of antimicrobial chemotherapy
High HIV prevalence among decedents received by two high-volume mortuaries in Kisumu, western Kenya, 2019.
Research Square
Co-infection, SARS-CoV-2 and influenza: an evolving puzzle.
The American journal of tropical medicine and hygiene
Outdoor Transmission of SARS-CoV-2 and Other Respiratory Viruses, a Systematic Review.
The Journal of antimicrobial chemotherapy
The impact of different types of violence on Ebola virus disease transmission during the 2018-2020 outbreak in the Democratic Republic of the Congo.
The Journal of antimicrobial chemotherapy
Facial Masking for Covid-19. Reply.
M_MED-CORE-PULM
Political prioritization and the competing definitions of adolescent pregnancy in Kenya: An application of the Public Arenas Model.
Research Square
HIV Care Continuum and Meeting 90-90-90 Targets: Cascade of Care Analyses of a U.S. Military Cohort.
Will Coronavirus Disease 2019 Become Seasonal?
The Journal of antimicrobial chemotherapy
Service delivery interventions to increase uptake of voluntary medical male circumcision for HIV prevention: A systematic review.
Research Square
Challenges to generating political prioritization for adolescent sexual and reproductive health in Kenya: A qualitative study.
Research Square
Neurological, Cognitive, and Psychological Findings Among Survivors of Ebola Virus Disease From the 1995 Ebola Outbreak in Kikwit, Democratic Republic of Congo: A Cross-sectional Study.
The American journal of tropical medicine and hygiene
Projections of Ebola outbreak size and duration with and without vaccine use in Équateur, Democratic Republic of Congo, as of May 27, 2018.
Research Square
Supportive interventions to improve retention on ART in people with HIV in low- and middle-income countries: A systematic review.
Research Square
Linking private, for-profit providers to public sector services for HIV and tuberculosis co-infected patients: A systematic review.
Research Square
Anatomy of a Hotspot: Chain and Seroepidemiology of Ebola Virus Transmission, Sukudu, Sierra Leone, 2015-16.
The Journal of antimicrobial chemotherapy
Effect of park prescriptions with and without group visits to parks on stress reduction in low-income parents: SHINE randomized trial.
Research Square
HIV and hepatitis B and C co-infection among people who inject drugs in Zanzibar.
PLOS global public health
Evaluating Google Flu Trends in Latin America: Important Lessons for the Next Phase of Digital Disease Detection.
The American journal of tropical medicine and hygiene
Evaluation of Kenya's readiness to transition from sentinel surveillance to routine HIV testing for antenatal clinic-based HIV surveillance.
H-Center for TB
Slowing of the HIV epidemic in Ukraine: evidence from case reporting and key population surveys, 2005-2012.
Research Square
Acquisition of GB virus type C and lower mortality in patients with advanced HIV disease.
The American journal of tropical medicine and hygiene
Human herpesvirus 8 infection in children and adults in a population-based study in rural Uganda.
The Journal of antimicrobial chemotherapy
Depression and HIV in Botswana: a population-based study on gender-specific socioeconomic and behavioral correlates.
Research Square
Public health triangulation: approach and application to synthesizing data to understand national and local HIV epidemics.
PLOS global public health
The role of breast-feeding in the prevention of Helicobacter pylori infection: a systematic review.
The American journal of tropical medicine and hygiene
Condoms in concentrated and generalised HIV epidemics.
M_PEDS-INFECTIOUS DISEASE
Thyroid function and perchlorate in drinking water: an evaluation among California newborns, 1998.
H_PPH-Domestic-TB
Pediatric acute lung injury: prospective evaluation of risk factors associated with mortality.
member
Risks of serious complications and death from smallpox vaccination: a systematic review of the United States experience, 1963-1968.
PLOS global public health
Emerging HIV-1 epidemic in China in men who have sex with men.
M_PEDS-INFECTIOUS DISEASE
Nonoxynol-9 for preventing vaginal acquisition of sexually transmitted infections by women from men.
Risk factors for injuries from in-line skating and the effectiveness of safety gear.
M_MED-CORE-PULM
Progression and clinical outcome of infection due to human immunodeficiency virus.
The American journal of tropical medicine and hygiene
The draft lottery and AIDS: evidence against increased intravenous drug use by Vietnam-era veterans.
The role of human immunodeficiency virus infection in pneumococcal bacteremia in San Francisco residents.
The Journal of antimicrobial chemotherapy
Human immunodeficiency virus infection in tuberculosis patients.
The Journal of antimicrobial chemotherapy
Detection of human immunodeficiency virus DNA using the polymerase chain reaction in a well-characterized group of homosexual and bisexual men.
The Journal of antimicrobial chemotherapy
The epidemiology of AIDS-related Kaposi's sarcoma in San Francisco.
The Journal of antimicrobial chemotherapy
Use of hospitals by patients with AIDS in San Francisco.
M_MED-CORE-PULM
The natural history of human immunodeficiency virus infection.
The Journal of antimicrobial chemotherapy
Survival patterns of the first 500 patients with AIDS in San Francisco.
The Journal of antimicrobial chemotherapy
Declining prevalence of Kaposi's sarcoma in homosexual AIDS patients paralleled by fall in cytomegalovirus transmission.
M_PEDS-INFECTIOUS DISEASE
Incidence of salmonellosis in patients with AIDS.
The Journal of antimicrobial chemotherapy
Outbreak of paralytic poliomyelitis, Taiwan.
M_PEDS-INFECTIOUS DISEASE