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 immune response.__4__

　　Don't smoke. Smoke 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 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.

　　__5__ Longtime heavy drinkers suffer from more colds and flu than others do, and even regular moderate use of alcohol can weaken immune response.

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

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

　　C．One study found that people typically touched their face fifteen times in an hour.

　　D．Many people are used to touching their faces when the flu is spreading.

　　E．Discuss with your doctor whether to immunize (使免疫) your children in daycare.

　　F．Studies on older mice have shown that those with reduced levels of vitamin E were more likely to be infected.

　　G．Reduce alcohol consumption (消费量)．

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