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Chelsea Alexandra
- Rate $25
- Response 1h

$25/h
1st lesson free
- Literacy
- Grammar
- Test Prep
- Resume preparation
- Proofreading
Graduate from Johns Hopkins University and Northwestern. Teaches English and Grammar. Willing to tutor other subjects.
- Literacy
- Grammar
- Test Prep
- Resume preparation
- Proofreading
Lesson location
About Chelsea Alexandra
Hello! My name is Chelsea, and I’m a public health professional and educator with advanced training in epidemiology, global health, and infection prevention. I hold a Master of Public Health in Applied Epidemiology and a Master of Science in Global Health, as well as a graduate certificate in Healthcare Epidemiology from Johns Hopkins University.
About the lesson
- All Levels
- English
All languages in which the lesson is available :
English
Introduction to Epidemiology: How Diseases Spread
Level
Beginner – Undergraduate / Adult learners / Public health students
Duration
60 minutes
⸻
Learning Objectives
By the end of this lesson, students will be able to:
1. Define epidemiology and explain its importance in public health.
2. Understand basic concepts such as incidence, prevalence, and risk factors.
3. Describe how epidemiologists investigate disease outbreaks.
4. Apply epidemiologic thinking to real-world health events.
⸻
Lesson Outline
1. Introduction (10 minutes)
• Brief introduction to epidemiology.
• Why epidemiology matters for global health, policy, and prevention.
• Real-world example: the role of epidemiology during the **COVID-19 pandemic.
Discussion Question:
Why do you think some diseases spread faster than others?
⸻
2. Core Concepts (20 minutes)
Key Terms
• Incidence – number of new cases in a population during a time period
• Prevalence – total number of cases in a population
• Risk factor – characteristic that increases disease likelihood
• Outbreak – sudden increase in disease cases
Example Activity
Students analyze a simple dataset:
Population: 10,000 people
New flu cases this month: 200
Question:
What is the incidence rate?
⸻
3. Case Study (20 minutes)
Case study: Foodborne illness outbreak investigation.
Students learn how epidemiologists:
1. Identify cases
2. Trace exposure sources
3. Test hypotheses
4. Implement prevention measures
Example historical case:
The 1854 Broad Street cholera outbreak investigation by John Snow.
Students examine a map of cases and identify the likely source.
⸻
4. Interactive Exercise (5–10 minutes)
Students answer:
• What might cause an outbreak in a university dormitory?
• What interventions could stop it?
Examples:
• vaccination
• quarantine
• improved sanitation
⸻
5. Wrap-Up (5 minutes)
Key takeaways:
• Epidemiology helps identify patterns of disease.
• Data drives public health decisions.
• Prevention strategies depend on understanding transmission.
⸻
Homework (Optional)
Students read about the eradication of Smallpox and write a short paragraph explaining how epidemiology contributed to global eradication.
Recommendations
Recommendations come from relatives, friends and acquaintances of the teacher
I’m happy to recommend Chelsea as a tutor on Superprof. I know Chelsea through mutual friends, and over time I’ve seen how dedicated she is to helping students learn and grow. She has a natural ability to connect with young learners and guide them with patience, encouragement, and professionalism.
What I appreciate most about Chelsea’s teaching style is how engaging and supportive she is. She makes lessons interactive and creates a comfortable environment where students feel confident asking questions and exploring ideas. Her background in public health and education gives her a strong foundation for explaining complex topics clearly and effectively.
I’ve also had the opportunity to see her mentor students preparing presentations and academic projects, and she always takes the time to break things down step by step while keeping students motivated. Her passion for education and her ability to connect with learners truly stand out.
Chelsea is thoughtful, knowledgeable, and genuinely invested in the success of her students. I highly recommend her to anyone looking for a supportive and inspiring tutor.View more recommendations
Rates
Rate
- $25
Pack rates
- 5h: $125
- 10h: $250
online
- $20/h
free lessons
This first lesson offered with Chelsea Alexandra will allow you to get to know each other and clearly specify your needs for your next lessons.
- 1hr
Chelsea Alexandra's Video
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