71

　　One recent study found that families whose children in daycare were immunized（免疫的） had 42% fewer infections with fever than those whose children weren’t immunized.

　　●Wash your hands frequently and thoroughly. A quick washing won’t do the trick.72

　　●Keep your hands away from your face to reduce the chance of delivering viruses directly to your eyes or nose.

　　73

　　●Make certain you’re getting vitamin E and other complex vitamins and minerals including A, C and B. These have properties（特性）that improve the immune response.74

　　●Don’t smoke. Smoking stops the hair like cells in the nose and airways from sweeping incoming viruses away before they can infect people.

　　●Use paper handkerchiefs, not cloth handkerchiefs to reduce the spread of infection.

　　●Reduce stress. Research has shown that immune responses are weakened by stress.

　　●Get seven to nine hours of sleep a night. Lack of sleep can reduce your immune response.

　　●

　　75

　　Longtime heavy drinkers suffer from more colds and flu than others do, and even regular moderate use of alcohol can weaken the immune response.

　　A. Children who are in a large family are easy to get flu.

　　B. To kill germs, experts recommend washing with soap for 15 to 30 seconds.

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