Our Team

Elaine Scallan, PhD


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Co-Director, ColoradoSPH 

Dr. Scallan is an Associate Professor in the Department of Epidemiology at the Colorado School of Public Health. Her research focuses on estimating the burden of foodborne disease and attributing foodborne illnesses to specific sources. She teaches a number of practice-based courses including Disease Outbreak Investigations (EPID 6640) and the Epidemiology of Foodborne and Diarrheal Diseases (EPID 6641). Prior to the Colorado School of Public Health, Dr. Scallan was the Team Lead of the Foodborne Diseases Active Surveillance Network (FoodNet) at the Centers for Disease Control and Prevention.

Email: elaine.scallanwalter@cuanschutz.edu

Rachel Jervis, MPH


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Co-Director, CDPHE 

Rachel earned a Bachelor of Science degree in Biology and Community Health from Tufts University in 2004, and a Master of Public Health in Epidemiology from Tufts University in 2005. Rachel is the Enteric Disease Unit Manager at the Colorado Department of Public Health and Environment. Rachel Co-Directs Colorado FoodNet and the Colorado Integrated Food Safety Center of Excellence and oversees enteric disease surveillance in Colorado. Rachel is passionate about training, program evaluation, connecting people to resources and tools, and improving foodborne disease surveillance and outbreak response; she loves a good prison outbreak. Prior to working for the state of Colorado, Rachel was a CSTE fellow in California and worked as a communicable disease epidemiologist at El Paso County Public Health. 

Email: rachel.jervis@state.co.us

Ingrid Hewitson, MPH


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Epidemiologist & Coordinator, CDPHE 

Ingrid earned a Master of Public Health degree from Johns Hopkins University in 2013. She began working at the Colorado Department of Public Health and Environment in 2012 as an environmental protection specialist. In 2017 Ingrid became an epidemiologist with the Colorado Integrated Food Safety Center of Excellence. Her emphasis is in foodborne outbreaks, data analysis, training, and developing new tools and resources to assist foodborne illness investigations. 

Email: Ingrid.Hewitson@state.co.us

Alice White, MS


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Epidemiologist Team Lead, ColoradoSPH 

Alice is a Research Instructor in the Department of Epidemiology at the Colorado School of Public Health. She leads the Enteric Disease Mobile Health project, Public Health Surveillance for Occupational Zoonoses, Outbreak Source Prediction project, and many other CoE trainings and analytical projects. Her research interests are enteric disease, outbreak investigation, mHealth, and public health education. She co-instructs Epidemiology of Foodborne and Diarrheal Diseases (EPID 6641) and Foodborne Disease Outbreak Detection, Investigation, and Control (EPID 6648). 

Email: alice.white@cuanschutz.edu

Lindsey Webb, MPH


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Epidemiologist, CDPHE 

Lindsey joined the Colorado Department of Public Health and Environment in 2019 as an epidemiologist with the Colorado Integrated Food Safety Center of Excellence. She earned a Master of Public Health from Georgia State University in 2012 and served as the Foodborne and Enteric Disease Epidemiologist for the Kansas Department of Health and Environment for 6 years. Lindsey is passionate about improving outbreak response and infectious disease prevention, and loves to talk about how not to get diarrhea from your favorite foods and animals. 

Email: lindsey.webb@state.co.us

Michelle Torok, MPH, PhD


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Epidemiologist, ColoradoSPH 

Dr. Torok received a Master of Public Health in Hospital and Molecular Epidemiology from the University of Michigan and a PhD in Epidemiology from the University of North Carolina at Chapel Hill. She has worked in foodborne disease epidemiology at the North Carolina Center for Public Health Preparedness and the National Centre for Biosecurity and Infectious Diseases in New Zealand. Her main research interest is infectious disease epidemiology, including foodborne/enteric disease epidemiology and outbreak investigation. 

Email: michelle.torok@cuanschutz.edu

Brittany Welence, MPH


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Instructional Technology Lead, ColoradoSPH 

Brittany earned her Master in Public Health degree in Epidemiology from the Colorado School of Public Health in 2016. She now works as a Instructional Technology Lead within the COE and the Rocky Mountain Public Health Training Center, aiding in the development of training materials for Colorado’s public health workforce. Brittany’s research interests include foodborne disease, graphic design, microbiology, and antimicrobial resistance. 

Email: brittany.welence@ucdenver.edu

Satvinder Dhaliwal, MPH


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Graduate Research Assistant, ColoradoSPH 

Satvinder Dhaliwal is currently pursuing her PhD in epidemiology at the Colorado School of Public Health. She received her MPH from Boston University in 2015, after which she worked as an epidemiologist in local and state public health departments in California. Satvinder’s research interests include network analysis, infectious diseases, mental health, and health equity. 

Email: Satvinder.Dhaliwal@cuanschutz.edu

Daniel Taylor, DVM, MPH


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Graduate Student Assistant, ColoradoSPH 

Dan is a veterinarian who is working towards a PhD in epidemiology at The Colorado School of Public Health. He received his veterinary degree in 2010 from Iowa State University and his Master in Public Health from the University of Iowa in 2010. Dan’s main areas of interest are antimicrobial resistance, food safety, infectious disease and veterinary epidemiology. 

Email: daniel.d.taylor@ucdenver.edu

Allison Seidel, MPH


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Graduate Student Assistant, ColoradoSPH 

Allison is currently pursuing her DrPH in Epidemiology at the Colorado School of Public Health. She received her MPH in Epidemiology from East Tennessee State University in 2012, after which she was an ORISE fellow working as an Epidemiologist with the US Air Force School of Aerospace Medicine. Allison is interested in infectious and communicable disease, food safety, public health training, and the intersection of those areas with disaster relief and emergency management. 

Email: Allison.Seidel@ucdenver.edu

Atisha Morrison


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Graduate Student Assistant, ColoradoSPH 

Atisha is currently pursuing her Master of Public Health in Environmental and Occupational Health. She is concurrently working at Jefferson County Public Health. She works as an Environmental Health Specialist in the consumer protection program as well as in foodborne epidemiology and emergency preparedness programs. Prior to her current position, Atisha received her Bachelor of Science in Environmental Health from Colorado State University in May 2015. Atisha’s interests include foodborne illness surveillance systems, training and education for outbreak investigators, environmental assessments and antecedents, food defense, enteric disease, and a good Norovirus story. 

Email: atisha.morrison@ucdenver.edu

Christine VanTubbergen


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Graduate Student Assistant, ColoradoSPH 

Christine VanTubbergen graduated in 2012 from Lewis & Clark College with a bachelors in Biochemistry & Molecular Biology. For the past three years she has worked as a microbiologist for PulseNet USA where she performed and validated WGS methods as well as assisted with Illumina MiSeq trainings for state laboratorians. In the past, Christine has also worked in a parasitology lab at OHSU and as a clinical coordinator at the University of Chicago. 

Email: Christine.VanTubbergen@ucdenver.edu

Natalie Oda


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Graduate Student Assistant, ColoradoSPH 

Natalie Oda is currently pursuing her MPH in Epidemiology at the Colorado School of Public Health after graduating from Purdue University with a degree in Biology in 2019. Prior to her position as a graduate assistant at the CoE, Natalie interned at the Palo Alto VA Office of Public Health Surveillance and Research working to analyze outbreak data and the Santa Clara County Public Health Department assessing annual grant spending. Natalie is passionate about communicable disease outbreak control and prevention and increasing access to public health education. 

Email: natalie.oda@cuanschutz.edu