Vaping can trigger asthma, according to the University of Texas, which has uncovered a “significant link” between using e-cigarettes and “earlier age of asthma onset.” Researchers at the university’s School of Public Health on its Houston campus found that people who reported themselves as “asthma-free” ended up increasing their risk “of developing earlier age of asthma onset by 252%” if they took up vaping. The researchers used data covering over 7000 adults and around 17,000 12 to 17-year-olds from the Population Assessment of Tobacco and Health Study, described as “a national longitudinal s…