The last thing you need in the middle of your preparation for a big race is illness. Below you'll find recommendations from the CDC on Handwashing
When washing hands with soap and water:
Wet your hands with clean running water and apply soap. Use warm water if it is available.
Rub hands together to make a lather and scrub all surfaces.
Continue rubbing hands for 20 seconds. Need a timer? Imagine singing "Happy Birthday" twice through to a friend!
Rinse hands well under running water
Dry your hands using a paper towel or air dryer. If possible, use your paper towel to turn off the faucet
Remember: If soap and water are not available, use alcohol-based gel to clean hands.
When using an alcohol-based hand sanitizer:
Apply product to the palm of one hand
Rub hands together
Rub the product over all surfaces of hands and fingers until hands are dry.
When should you wash your hands?
Before preparing or eating food
After going to the bathroom
After changing diapers or cleaning up a child who has gone to the bathroom
Before and after tending to someone who is sick
After blowing your nose, coughing, or sneezing
After handling an animal or animal waste
After handling garbage
Before and after treating a cut or wound
Keep your immune system strong by getting plenty of sleep, eat healthy (think vegetables, fruit, whole grains, and lean protein), limit alcohol and caffeine, and take a potent antioxidant supplement. Make sure you allow adequate recovery following a particularly hard or long workout.