Write the following list of characters into a correctly formed sentence: Coccidioidomycosissetsinfrom7to20daysafterexposure,thoughsomedogscandevelopimmunityandnevershowanysymptoms,especiallyyoungerdogs.
Coccidioidomycosis sets in from 7 to 20 days after exposure, though some dogs can develop immunity and never show any symptoms, especially younger dogs.