Energetic, happy and relaxed people are less likely to catch cold than depressed, nervous and irritable people. When the brain is "relaxed and happy", it sends signals to various organs to help keep the body healthy. Maintaining a healthy mood can effectively reduce the likelihood of colds, pneumonia and even cancer. In addition, people who are in a relaxed and happy mood tend to have better health care habits than those who are negative and nervous. They are more likely to get enough sleep and exercise regularly, and they have lower levels of certain stress hormones.<br>
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