A 16-year-old, previously healthy boy came to the hospital with a history of fever for several days, nonproductive cough, and coryza. On examination he appeared to be acutely ill; his temperature was 103.1°F, with a pulse of 120 and a respiratory rate of 18 breaths per minute. Oral examination revealed small white spots on the buccal mucosa that resembled grains of salt and had a reddish background. Identify the spots and the underlying disease.
Source: Canadian Medical Association Journal. Detailed citation will be provided with the explanation. *This case is from Docplexus Editorial Team for educative purpose only.