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Nature Communications|June 29, 2023
Increased vaccine sensitivity of an emerging SARS-CoV-2 variantJoseph A Lewnard, Vennis Hong, Jeniffer S Kim, et al.
Journal of Medical Internet Research|August 5, 2021
Disparities in Outpatient and Telehealth Visits During the COVID-19 Pandemic in a Large Integrated Health Care Organization: Retrospective Cohort StudyLei Qian, Lina S Sy, Vennis Hong, et al.
American Journal of Epidemiology|June 4, 2025
A three-part model for the self-controlled case series design to estimate and characterize adverse event risk in an overlapping risk period after multiple vaccines: application to ischemic stroke following Pfizer-BioNTech bivalent COVID-19 vaccine and influenza vaccineStanley Xu, Lina S Sy, Xuan Huang, et al.
Vaccine|November 12, 2023
Factors associated with uptake of bivalent mRNA COVID-19 vaccines in a large US health care systemKatia J Bruxvoort, Lina S Sy, Vennis Hong, et al.
Vaccine|April 11, 2025
Development and validation of a clinical prediction tool for non-receipt of updated COVID-19 vaccinesKatia J Bruxvoort, Lina S Sy, Richard Contreras, et al.
The Lancet. Respiratory Medicine|April 25, 2022
Durability of BNT162b2 vaccine against hospital and emergency department admissions due to the omicron and delta variants in a large health system in the USA: a test-negative case-control studySara Y Tartof, Jeff M Slezak, Laura Puzniak, et al.
Vaccine|August 6, 2025
Differences in COVID-19 XBB.1.5 vaccination coverage: A decomposition analysis across racial and ethnic groups in a large U.S. healthcare systemStanley Xu, Lina S Sy, Richard Contreras, et al.
JAMA Network Open|August 3, 2022
Effectiveness Associated With BNT162b2 Vaccine Against Emergency Department and Urgent Care Encounters for Delta and Omicron SARS-CoV-2 Infection Among Adolescents Aged 12 to 17 YearsSara Y Tartof, Timothy B Frankland, Jeff M Slezak, et al.
JMIR Public Health and Surveillance|November 29, 2022
Natural Language Processing for Improved Characterization of COVID-19 Symptoms: Observational Study of 350,000 Patients in a Large Integrated Health Care SystemDeborah E Malden, Sara Y Tartof, Bradley K Ackerson, et al.
The Lancet. Respiratory Medicine|October 10, 2022
Effectiveness and durability of BNT162b2 vaccine against hospital and emergency department admissions due to SARS-CoV-2 omicron sub-lineages BA.1 and BA.2 in a large health system in the USA: a test-negative, case-control studySara Y Tartof, Jeff M Slezak, Laura Puzniak, et al.
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