I find these findings to be true in my own life. With vigorous exercise you can ward off the flu according to new data from London School of Hygiene and Tropical Medicine:

Findings suggest that 100 cases of flu per 1,000 people could be prevented just by stepping up exercise.

However, moderate exercise appears to have little effect on rates of flu-like illness which means the intensity is all important, say researchers.

In the UK people are advised to do 150 minutes of moderate activity such as gardening, dancing or brisk walking, or 75 minutes of vigorous exercise including playing sport, running or aerobics every week. Three out of four Britons fail to achieve this.

Picture via karmajello.com.