[RummyChick]

So a person says

Hey Doc, I have a cough and some congestion.

No fever.

Contagious or not?

I don’t think you can say with certainty that the person isn’t contagious. Too much is unknown.

The doc will think he has the flu or a cold

Unless he asks did you fly on a plane with some chinese people.

Then he might rethink it.

In the meantime, Good Ole Doc just caught the virus.

[Smogger]

People infected with the Coronavirus can have absolutely no symptoms from 2-5 days. During that time they are contagious.

https://youtu.be/QA5AbqlCHuc?t=208

[rdl6989]

3rd confirmed case in France & a total of 1,126 cases around the world
#CoronavirusOutbreak

https://twitter.com/Comdr_ToirAC/status/1220861952337108994

[palmer]

No fever.
Contagious or not?
I don’t think you can say with certainty that the person isn’t contagious. Too much is unknown.

Yes too much is unknown and i am certainly not an expert. But I do know that those viruses cause fever and aches along with cough. Maybe not always, but usually. If it only causes cough in a large number of cases, then it is not a particularly lethal virus at that point. I put the caveat in bold. but I have not seen any evidence there is a two phase process of benign infection followed by lethal infection.