Perchance have you previously had a cold virus? By any chance did you recover from the infection? Obviously you survived it! You won't treat an acute rhinitis directly, however your body typically creates resistance to a specific cold virus within several days. That is called cured by your own immune response!

Parents have in the past had a lot of the cold viruses. Grownups have developed resistance to the colds they have suffered from. So there are not numerous runny nose viruses around for adults to become infected with. That is why grownups only acquire a few runny noses each year and children get a dozen runny noses each year.
https://connervsul099.mozello.com/blog/params/post/3338492/hpv-healing-naturally-about