Follow the below link to register for John Hopkin’s Contact Tracing: The COVID-19 crisis has created an unprecedented need for contact tracing across the country, requiring thousands of people to learn key skills quickly. The job qualifications for contact tracing positions differ throughout the country and the world, with some new positions open to individuals with a high school diploma or equivalent. In this introductory course, students will learn about the science of SARS-CoV-2 , including the infectious period, the clinical presentation of COVID-19, and the evidence for how SARS-CoV-2 is transmitted from person-to-person and why contact tracing can be such an effective public health intervention. Students will learn about how contact tracing is done, including how to build rapport with cases, identify their contacts, and support both cases and their contacts to stop transmission in their communities. The course will also cover several important ethical considerations around contact tracing, isolation, and quarantine. Finally, the course will identify some of the most common barriers to contact tracing efforts — along with strategies to overcome them. · Describe the natural history of SARS-CoV-2 , including the infectious period, the presentation of COVID-19, and evidence for how it is transmitted. · Define an infectious contact and timeline for public health intervention through contact tracing. · Demonstrate the utility of case investigation and contact tracing, identify common barriers, and possible strategies to overcome them. · Present some ethical considerations around contact tracing, isolation and quarantine. Ethics Active Listening Public Health Contact Tracing Epidemiology


The COVID-19 pandemic has sparked an urgent need for contact tracing, a critical public health intervention aimed at identifying and isolating individuals who may have been exposed to the SARS-CoV-2 virus. Contact tracing plays a vital role in containing the spread of infectious diseases by interrupting transmission chains. In this course, we will explore the science behind SARS-CoV-2, the infectious period of COVID-19, and how the virus is transmitted from person to person. We will also delve into the principles and strategies of contact tracing, including building rapport with cases, identifying contacts, and supporting both cases and their contacts to stop transmission in communities.

Natural History of SARS-CoV-2:

To understand the intricacies of contact tracing, it is crucial to comprehend the natural history of SARS-CoV-2. This includes understanding the infectious period, or the duration during which an infected person can transmit the virus to others. The infectious period for COVID-19 typically spans from a few days before symptoms appear to several days after. It is essential to identify this window accurately to effectively trace contacts and prevent further transmission.

Furthermore, we will explore the clinical presentation of COVID-19, enabling us to recognize the signs and symptoms of the disease. Common symptoms include fever, cough, and shortness of breath, but it is important to note that COVID-19 can also manifest in atypical ways or even be asymptomatic. Understanding the clinical presentation is crucial for identifying potential cases during contact tracing efforts.

Transmission of SARS-CoV-2:

The evidence for how SARS-CoV-2 is transmitted from person to person is still emerging, but several primary routes have been identified. The virus primarily spreads through respiratory droplets expelled when an infected individual coughs, sneezes, talks, or breathes heavily. These droplets can be inhaled by others in close proximity, typically within 6 feet of the infected individual. Evidence also suggests that the virus can remain viable on surfaces for varying durations, contributing to the potential for indirect transmission through touching contaminated surfaces and then touching one’s face.

Contact Tracing Basics:

Once we have established the scientific foundation, we will dive into the principles and strategies behind contact tracing. Contact tracing involves identifying close contacts of confirmed cases and notifying them of their potential exposure to the virus. This process is instrumental in interrupting transmission chains and preventing further spread. By isolating infected individuals and quarantining their contacts, contact tracing plays a crucial role in reducing community transmission.

Building rapport with cases is an essential aspect of contact tracing. We will explore techniques to establish trust and effectively communicate with individuals who have tested positive for COVID-19. Establishing trust helps gather reliable information about the case’s interactions and enables the contact tracer to identify potential contacts more accurately.

Identifying contacts is a key step in contact tracing. We will discuss different types of contacts, including close contacts who have been in direct and prolonged contact with an infected individual, and casual contacts who have had limited or brief interactions. Understanding the definition of an infectious contact and the timeline for intervention is crucial for prioritizing contact tracing efforts and allocating resources effectively.

Supporting cases and contacts is a vital component of contact tracing, as it ensures individuals understand and adhere to isolation and quarantine recommendations. We will explore the various challenges faced by cases and contacts during their isolation and quarantine periods and discuss strategies to address these barriers effectively.

Ethical Considerations in Contact Tracing:

As with any public health intervention, contact tracing raises important ethical considerations. We will delve into the ethical implications of contact tracing, isolation, and quarantine. Balancing individual privacy rights with the need to protect public health presents a complex ethical dilemma that contact tracers must navigate. We will examine strategies to address ethical concerns and uphold ethical principles throughout the contact tracing process.

Barriers and Strategies in Contact Tracing:

Despite its effectiveness, contact tracing can encounter various barriers that impede its success. We will identify these common challenges and explore strategies to overcome them. Barriers may include inadequate resources, mistrust or misinformation, and non-compliance. Understanding these barriers and implementing appropriate strategies is vital for optimizing contact tracing efforts and achieving desired outcomes in disease control.


In this introductory course on contact tracing, we have explored the science of SARS-CoV-2, the infectious period of COVID-19, and the evidence for its transmission. We have also examined the principles, strategies, and ethical considerations of contact tracing, along with common barriers and strategies to overcome them. By developing a comprehensive understanding of these concepts, students will be equipped with the knowledge and skills needed to contribute effectively to contact tracing efforts in their communities.