Can someone please remind me what the SF cough is like?

[Conundrumish]

DH says it is dry. DS isn't producing any phlegm but it sounds chesty and moist sounding.

Thanks

I'm not sure if there is a specific SF cough?

anyway, dd1 had sf (well strongly suspected) and it was a dry cough, quite severe but v short lived (3 days or so of actual coughing)

Thanks.