In stochastic processes, chaos theory and time series analysis, detrended fluctuation analysis (DFA) is a method for determining the statistical self-affinity of a signal.
Sore throats caused by tonsillitis or streptococcus may trigger a canker sore even after the initial throat condition has subsided. Also known as an aphthous ulcer, canker sores are painful and unsightly, but they are not contagious.
Sore throats can be caused by MANY things....viral infections, bacterial infections (like Strep), mono, post nasal drainage from sinusitis, breathing through your mouth when your nose is clogged, cigarettes, allergy....LOTS of things. Can it last two weeks? You bet.