is flu always contagious
Someone with the flu is contagious for a day or so before symptoms start, then remains contagious for five to seven days once they appear. The CDC considers someone to be contagious until the fever is back to normal, without the help of medication, for 24 to 48 hours.
Notice if your sore throat is accompanied by a runny nose. When you have a contagious illness, like the flu or a cold, the sore throat is often accompanied by a runny nose. A sore throat without a runny nose but with symptoms such as a fever, rash, or headache, can be a sign of strep throat.