Despite laws in many states that protect non-smokers from secondhand smoke, exposure remains especially high for children ages 3 to 11, African-Americans, and those who live in poverty or rental housing, according to a recent report. Jessica Hollenbach, the director of asthma programs at the Connecticut Children’s Medical Center, agreed with the report, done by the U.S. Centers for Disease Control and Prevention, and said tobacco is a negative toxin that can make other illnesses worse. Hollenbach studies the relationship between secondhand smoke exposure and asthma in children. She said tobacco is an asthma trigger, and children with asthma often have higher exposure to second-hand smoke. In Connecticut, 13.9 percent of public school students have asthma, according to a state Department of Public Health report released last year.