Reps equal times you lift a certain amount ( ex: 25 pounds arm or leg lifts and repeating same movement # of times ( say 30x) would be Reps. Better to lift less weight and do more Reps.
"Studying the Spanish flu virus’s interaction with monkeys may help health officials prepare for a possible pandemic caused by H5N1"
from www.nytimes.com/2007/01/18/health/18flu.html
Its important to study the Spanish Flu because they need to learn why/how it happened and to prevent similar diseases in the future