... if possible, or open the windows. ■ If you work in an environment with high exposures to fine particles, fibers, or dusts, wear the appropriate protective mask over your nose and mouth and ... many diseases, including certain cancers. To find which category you are in, locate your height and move across the chart to your weight. CANCER AND THE ENVIRONMENT 8 ■ Alcoholic drinks Heavy ... procedure if you are 18 years of age or younger. Also, get vaccinated if you are over 18 and at risk of infection. At-risk people include health care workers, IV drug users, and homosexual...