How can I stop a cold spreading?

You can take some simple steps to help prevent the spread of a cold. For example:

wash your hands regularly,

 particularly before touching your nose or      mouth and before handling food

• always sneeze and cough into tissues – this will help prevent the virus-containing droplets from your nose and mouth entering the air, where they can infect others; you should throw away used tissues immediately and wash your hands 
• clean surfaces regularly to keep them free of germs 
• use your own cup, plates, cutlery and kitchen utensils
• don't share towels or toys with someone who has a cold

It's been suggested that vitamin C,zinc and garlic supplements may help reduce your risk of getting a cold, but there's currently not enough strong evidence to support this.