Carrie Lam Cheng Yuet-ngor’s term as chief executive has been marked by tumultuous events. But in terms of public health, a decade or two from now she may also be remembered for her role in the ban on the import and sale of e-cigarettes and other alternatives that has just become law. The ban, first proposed seven years ago, was watered down in 2018 to the permissive regulation that applies to tobacco products. Opposition to the backdown from medical and education authorities prompted Lam to switch to proposing the full ban in her policy address that year.