Fall in Knoxville brings a lot to look forward to cooler mornings, football Friday nights, busy school calendars, weekend festivals, soccer practices, marching band rehearsals and afternoons spent enjoying the changing season. But for many families, fall also brings an unwelcome guest ragweed pollen. If sneezing seems to start just as the kids head back to school, or itchy, watery eyes show up every time you spend an afternoon outside, ragweed allergies could be the ...