well...I always attempted to lift through but your workouts are usually **** because you feel like ****, lol.
The difference between test flu and an infection has to be monitored according to the injection site...if it becomes warm to the touch, redness, red lines, swelling etc will distinguish a flu caused by an infection where as with test flu you have all of the synptoms with no injection site problems.
Another thing that is hard is eating when you have test flu...for those 4 or 5 days i usually find it difficult to cram 2000 calories down
regards,
COTC