This news item is about: When Tatiana Thomas wasn't busy completing her M.B.A. degree or earning a graduate certificate in epidemiology, she was following her passion for human wellness by teaching yoga. But the practice came with a sobering realization. “I wanted everyone to have access to yoga's many health benefits, but in my community a lot of people couldn't afford to hire an instructor for $45 to $60 per hour,” said the first-year student in the Master of Public Health program from Springfield, Ill. “Seeing that disparity among the type of people I wanted to help and those I was able to help — it was jarring.”