From this site: [
www.cbc.ca]
How soon after exposure and infection can you reliably expect a positive nasal swab test?
Unfortunately, there isn't a set number of days.
And you can only really count on a positive test if you have symptoms, according Dr. Matthew Cheng, a microbiologist and infectious disease specialist at the McGill University Health Centre.
... and from this site: [
www.health.harvard.edu]
If you are going to show symptoms (which not everyone does) they can show up anywhere from 3 to 14 days after you are exposed, though symptoms typically appear within four or five days after exposure.
A person with COVID-19 may be contagious 48 to 72 hours before starting to experience symptoms. Most people with COVID-19 who have symptoms will no longer be contagious by 10 days after symptoms resolve. So that's a 12 to 13 day window where someone is contagious.
AlbaNY_Ram
