Winter colds depart in a few days, but summer ones linger, then may seem to go away, then come back.
Summer colds--surprise--are caused by different viruses than winter colds. Summer is a rhinovirus, winter an enterovirus.
And, in summer, people don't rest, they run around and exercise--and then go in and out of air-conditioned buildings.
Summer colds are rarer than winter colds--about 25% as common. But they are more flu-like. You can get a fever, even diarrhea or a rash.
Many people think they are allergies--but they aren't.
So, if you get one, don't attempt to exercise more to sweat it out. This can make it worse.
Zinc works better on winter colds than summer colds, and the research is patchy on zinc in general.
So, if you get a summer cold, be prepared to dog it for a while, and drink a lot of fluids. They always say that. How else can you make more mucus?
I hate that word.