Baby getting sick?

9 month old baby woke up this morning with a runny nose.

No other symptoms at all! No fever, not being fussy, not sleeping more or eating less, no cough.

Acting like her normal, happy self.

Can babies this young have allergies? The pollen is bad where I live and we’ve been super busy lately so I haven’t been able to dust in a while.

Could it be allergies, or is she potentially getting sick?