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The San Diego County COVID-19 e-Decision Tree for K-12 Schools (e-Decision Tree) is a digital representation of the San Diego County COVID-19 K-12 Decision Trees, which were created and are maintained by the San Diego County Office of Education and County of San Diego Health and Human Services Agency, Public Health Services.

The e-Decision Tree is developed by the San Diego Supercomputer Center, University of California San Diego (UCSD) in collaboration with the UC San Diego School of Medicine Division of Child and Community Health and the San Diego County Office of Education to assist school administrators in determining the appropriate actions for when students or school personnel exhibit COVID-19 symptoms or are exposed to COVID-positive individuals, and what testing procedures to follow.

  • PDF and Spanish language versions of the San Diego County COVID-19 K-12 Decision Tree, and the answers to frequently asked questions on the decision trees are available at

  • The San Diego County COVID-19 K-12 Decision Trees are endorsed by the San Diego Academy of Family Physicians and the American Academy of Pediatrics – California Chapter 3 (San Diego and Imperial Counties.)

  • The e-Decision Tree is designed for use by schools in San Diego County, based on guidance from the California Department of Public Health and San Diego County’s public health orders.

For San Diego County Schools:

  • School leaders are required to report to public health services at 888-950-9905 as soon as they become aware of a positive case on campus.

  • For help with questions on exposures, symptoms or other related issues, school leaders in San Diego County may also call the county Epidemiology School Line at 619-692-8636 and leave a message.

  • Individuals from other counties should contact their local health department with questions.




(This question is mandatory)

Does the person (vaccinated and unvaccinated) have one or more symptoms associated with COVID-19?

Possible symptoms include: fever, chills, cough, shortness of breath or difficulty breathing, fatigue, muscle or body aches, headache, new loss of taste or smell, sore throat, congestion or runny nose, nausea or vomiting, and/or diarrhea

!!! Isolate the person pending a final determination based on the questions below !!!

(This question is mandatory)

Is the person a student or a K-12 worker?

(This question is mandatory)

Is there a documented preexisting condition that accounts for the symptoms?

The documentation should be in school records or verified by a physician using the Certification of Chronic Medical Condition form (click to download) or the symptoms should be attributable to a side effect of a flu or COVID-19 vaccine [Hover to see how to manage vaccine side effects]

(This question is mandatory)

Is there a verified medical diagnosis of another illness that accounts for the symptoms?

(This question is mandatory)

Result of COVID-19 test after onset of symptoms?

(This question is mandatory)

Has the person tested positive for COVID-19?

(This question is mandatory)

Was the person identified as a close contact within the last 10 days?

In other words, did the person share a common indoor airspace with a person who was contagious with COVID-19 for 15 minutes or more in a 24-hour period (spaces <400,000 CF) OR was within 6 feet of the infected person (spaces >400,000 CF) for 15 minutes or more in a 24-hour period?

(This question is mandatory)

Does the close contact live with a household member who has COVID-19?

(This question is mandatory)

Did the exposure occur at school/work?

(This question is mandatory)

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