When he first saw a map of malaria's range, Mann says it was as if the scales had fallen from my eyes. That range extends almost precisely to the Mason-Dixon Line, along which the American Civil War broke out in 1861, between the slave-holding states of the South and the Union soldiers of the North.
Opened yogurt will typically stay at peak quality for 5 to 7 days after opening, but will generally remain safe to consume for at least 1 to 2 weeks after the sell by date on the package, provided it has been properly stored- discard entire package if any sign of mold appears.
When stored in the refrigerator, yogurt stays safe for between 10 and 21 days, according to the National Center for Home Food Preservation. If your yogurt becomes extremely runny, or if it has a sour smell or bits of black or green mold, throw the entire carton away.