From John Hopkins Contact Tracing
The incubation period describes the time between close contact of an infected person and becoming infectious.
The range for incubation is between 2-14 days. This is why people are told to quarantine for 14 days and cases are traced back 2 days to determine close contacts.
Five percent (5%) of people who have been in close contact with an infected person develop the virus ( have signs of symptoms) within 2 days.
Fifty percent ( 50%) of people will develop signs or symptoms within 5 days of exposure.
This is why we health screen and do not admit anyone with signs or symptoms.
This is why our nurses have isolation rooms should a person develop any signs or symptoms once they arrive to our schools.