Staying active can help your immune system stay fighting fit, but gyms are known to be a breeding ground for germs. Rather than avoiding the gym all together, instead think about taking your own clean towel to sit on and wipe down free weights and handlebars before use. Viruses can also survive on surfaces, such as communal fountains, for up to 24 hours. Avoid contact by taking and drinking from your own water bottle.
Viruses enter the body through soft areas like the nasal passage. Daily rinsing can help flush out nasty bugs and germs. You can buy nasal saline from your local pharmacy, or alternatively you can make your own: Mix 3 teaspoons of iodine-free salt and 1 teaspoon of baking soda. Add 1 teaspoon of this mixture to 1 cup of cooled boiled water.