This episode of You Are Here discusses a new jaywalking bill, why many are unhappy with Boston’s raised tobacco purchasing age, and remembers Harper Lee and the impact she had on American literature. It explores how the primary calendar affects the presidential race and how to improve bike safety in Massachusetts. It also features an exclusive interview with MIT professor Lydia Bourguiba about her study that involved taking high speed photos and videos of over one hundred sneezes to learn more about how diseases are spread.