In 2009 a research study gave a conclusion that people who regularly get 8 hours of sleep and a better quality sleep are immune to cold. So there is a direct connection between your sleep and cold .Cold spreads during the winter because people tend to stay indoors. If there is a person who has cold at home there are high chances of contracting the infection.
Prevention is better than cure.
If cold drinks or any food item or ice creams are allergic to you in winter avoid it. Proper hygiene is very important to avoid cold infections.Keep your hands and household sanitized .If you come across door handles or lift in any public places wash your hands with sanitizer. Use disposable towels or tissues to prevent spread of virus If you have already infected with cold drink plenty of hot soups, hot liquids. Avoid fried items , take light food.
Regular exercise will boost the immunity:
Be active to flush out the bacterias from lungs.
Any form of exercise will temporarily increase the body temperature which in turn stops bacteria from growing.
Exercise reduces the release of stress harmones .